1994775164928 has 1152 divisors, whose sum is σ = 7788984053760. Its totient is φ = 494956707840.

The previous prime is 1994775164909. The next prime is 1994775164947. The reversal of 1994775164928 is 8294615774991.

1994775164928 is a `hidden beast` number, since 1 + 9 + 9 + 47 + 7 + 516 + 49 + 28 = 666.

It is an interprime number because it is at equal distance from previous prime (1994775164909) and next prime (1994775164947).

It is a tau number, because it is divible by the number of its divisors (1152).

It is a super-2 number, since 2×1994775164928² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 769884913 + ... + 769887503.

It is an arithmetic number, because the mean of its divisors is an integer number (6761270880).

Almost surely, 2^{1994775164928} is an apocalyptic number.

1994775164928 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1994775164928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3894492026880).

1994775164928 is an abundant number, since it is smaller than the sum of its proper divisors (5794208888832).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1994775164928 is a wasteful number, since it uses less digits than its factorization.

1994775164928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2665 (or 2633 counting only the distinct ones).

The product of its digits is 274337280, while the sum is 72.

The spelling of 1994775164928 in words is "one trillion, nine hundred ninety-four billion, seven hundred seventy-five million, one hundred sixty-four thousand, nine hundred twenty-eight".