1916492489478 has 192 divisors, whose sum is σ = 5224988448000. Its totient is φ = 517750869888.

The previous prime is 1916492489473. The next prime is 1916492489533. The reversal of 1916492489478 is 8749842946191.

1916492489478 is a `hidden beast` number, since 1 + 9 + 1 + 6 + 492 + 48 + 94 + 7 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1916492489473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 26256858 + ... + 26329746.

It is an arithmetic number, because the mean of its divisors is an integer number (27213481500).

Almost surely, 2^{1916492489478} is an apocalyptic number.

1916492489478 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1916492489478, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2612494224000).

1916492489478 is an abundant number, since it is smaller than the sum of its proper divisors (3308495958522).

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

1916492489478 is a wasteful number, since it uses less digits than its factorization.

1916492489478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73456 (or 73443 counting only the distinct ones).

The product of its digits is 250822656, while the sum is 72.

The spelling of 1916492489478 in words is "one trillion, nine hundred sixteen billion, four hundred ninety-two million, four hundred eighty-nine thousand, four hundred seventy-eight".