16864731774 has 24 divisors (see below), whose sum is σ = 39862093752. Its totient is φ = 5110524720.

The previous prime is 16864731773. The next prime is 16864731791. The reversal of 16864731774 is 47713746861.

It is a happy number.

16864731774 is a `hidden beast` number, since 16 + 86 + 473 + 17 + 74 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 16864731774.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16864731773) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42587509 + ... + 42587904.

It is an arithmetic number, because the mean of its divisors is an integer number (1660920573).

Almost surely, 2^16864731774 is an apocalyptic number.

16864731774 is an abundant number, since it is smaller than the sum of its proper divisors (22997361978).

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

16864731774 is a wasteful number, since it uses less digits than its factorization.

16864731774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85175432 (or 85175429 counting only the distinct ones).

The product of its digits is 4741632, while the sum is 54.

The spelling of 16864731774 in words is "sixteen billion, eight hundred sixty-four million, seven hundred thirty-one thousand, seven hundred seventy-four".