818196072980544 has 84 divisors (see below), whose sum is σ = 2345215809241500. Its totient is φ = 272731501486080.

The previous prime is 818196072980471. The next prime is 818196072980551. The reversal of 818196072980544 is 445089270691818.

818196072980544 is a `hidden beast` number, since 8 + 1 + 8 + 1 + 9 + 6 + 0 + 72 + 9 + 8 + 0 + 544 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 795571666574400 + 22624406406144 = 28205880^2 + 4756512^2 .

It is a Smith number, since the sum of its digits (72) coincides with the sum of the digits of its prime factors.

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 404061484 + ... + 406081364.

Almost surely, 2^{818196072980544} is an apocalyptic number.

It is an amenable number.

818196072980544 is an abundant number, since it is smaller than the sum of its proper divisors (1527019736260956).

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

818196072980544 is a wasteful number, since it uses less digits than its factorization.

818196072980544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2723148 (or 2723135 counting only the distinct ones).

The product of its (nonzero) digits is 278691840, while the sum is 72.

The spelling of 818196072980544 in words is "eight hundred eighteen trillion, one hundred ninety-six billion, seventy-two million, nine hundred eighty thousand, five hundred forty-four".