1618919952804 has 864 divisors, whose sum is σ = 5605413445632. Its totient is φ = 396809280000.

The previous prime is 1618919952799. The next prime is 1618919952809. The reversal of 1618919952804 is 4082599198161.

1618919952804 is a `hidden beast` number, since 1 + 6 + 18 + 9 + 1 + 99 + 528 + 0 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (1618919952799) and next prime (1618919952809).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (1618919952809) by changing a digit.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 2693710104 + ... + 2693710704.

Almost surely, 2^{1618919952804} is an apocalyptic number.

1618919952804 is a gapful number since it is divisible by the number (14) 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 1618919952804, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2802706722816).

1618919952804 is an abundant number, since it is smaller than the sum of its proper divisors (3986493492828).

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

1618919952804 is a wasteful number, since it uses less digits than its factorization.

1618919952804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 721 (or 698 counting only the distinct ones).

The product of its (nonzero) digits is 11197440, while the sum is 63.

The spelling of 1618919952804 in words is "one trillion, six hundred eighteen billion, nine hundred nineteen million, nine hundred fifty-two thousand, eight hundred four".