16640762544 has 120 divisors (see below), whose sum is σ = 53255153952. Its totient is φ = 4751723520.

The previous prime is 16640762483. The next prime is 16640762563. The reversal of 16640762544 is 44526704661.

16640762544 is a `hidden beast` number, since 1 + 6 + 6 + 40 + 7 + 62 + 544 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 16640762544.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2235052 + ... + 2242484.

Almost surely, 2^16640762544 is an apocalyptic number.

16640762544 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 16640762544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26627576976).

16640762544 is an abundant number, since it is smaller than the sum of its proper divisors (36614391408).

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

16640762544 is a wasteful number, since it uses less digits than its factorization.

16640762544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9675 (or 9666 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 45.

The spelling of 16640762544 in words is "sixteen billion, six hundred forty million, seven hundred sixty-two thousand, five hundred forty-four".