16640130640 has 80 divisors (see below), whose sum is σ = 44712138240. Its totient is φ = 5641067520.

The previous prime is 16640130629. The next prime is 16640130659. The reversal of 16640130640 is 4603104661.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 117096 + ... + 216775.

It is an arithmetic number, because the mean of its divisors is an integer number (558901728).

Almost surely, 2^16640130640 is an apocalyptic number.

16640130640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16640130640 is an abundant number, since it is smaller than the sum of its proper divisors (28072007600).

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

16640130640 is a wasteful number, since it uses less digits than its factorization.

16640130640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333980 (or 333974 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

The spelling of 16640130640 in words is "sixteen billion, six hundred forty million, one hundred thirty thousand, six hundred forty".