16431655140 has 72 divisors (see below), whose sum is σ = 51688728000. Its totient is φ = 4381773408.

The previous prime is 16431655109. The next prime is 16431655181. The reversal of 16431655140 is 4155613461.

16431655140 is a `hidden beast` number, since 1 + 64 + 3 + 1 + 6 + 551 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 16431655095 and 16431655104.

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, 1685640 + ... + 1695359.

It is an arithmetic number, because the mean of its divisors is an integer number (717899000).

Almost surely, 2^16431655140 is an apocalyptic number.

16431655140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16431655140 is an abundant number, since it is smaller than the sum of its proper divisors (35257072860).

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

16431655140 is a wasteful number, since it uses less digits than its factorization.

16431655140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3381023 (or 3381009 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The spelling of 16431655140 in words is "sixteen billion, four hundred thirty-one million, six hundred fifty-five thousand, one hundred forty".