16400615136 has 24 divisors (see below), whose sum is σ = 43051614984. Its totient is φ = 5466871680.

The previous prime is 16400615113. The next prime is 16400615141. The reversal of 16400615136 is 63151600461.

It is a tau number, because it is divible by the number of its divisors (24).

It is a junction number, because it is equal to n+sod(n) for n = 16400615097 and 16400615106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85419775 + ... + 85419966.

It is an arithmetic number, because the mean of its divisors is an integer number (1793817291).

Almost surely, 2^16400615136 is an apocalyptic number.

16400615136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

16400615136 is an abundant number, since it is smaller than the sum of its proper divisors (26650999848).

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

16400615136 is a wasteful number, since it uses less digits than its factorization.

16400615136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170839754 (or 170839746 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 33.

The spelling of 16400615136 in words is "sixteen billion, four hundred million, six hundred fifteen thousand, one hundred thirty-six".