20116761641604 has 72 divisors (see below), whose sum is σ = 51464676305952. Its totient is φ = 6624627834240.

The previous prime is 20116761641567. The next prime is 20116761641663. The reversal of 20116761641604 is 40614616761102.

20116761641604 is a `hidden beast` number, since 2 + 0 + 1 + 16 + 7 + 616 + 4 + 16 + 0 + 4 = 666.

It is a super-2 number, since 2×20116761641604² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20116761641604.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 180213232 + ... + 180324824.

It is an arithmetic number, because the mean of its divisors is an integer number (714787170916).

Almost surely, 2^{20116761641604} is an apocalyptic number.

It is an amenable number.

20116761641604 is an abundant number, since it is smaller than the sum of its proper divisors (31347914664348).

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

20116761641604 is a wasteful number, since it uses less digits than its factorization.

20116761641604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172017 (or 172012 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The spelling of 20116761641604 in words is "twenty trillion, one hundred sixteen billion, seven hundred sixty-one million, six hundred forty-one thousand, six hundred four".