16931802640 has 40 divisors (see below), whose sum is σ = 40204033920. Its totient is φ = 6628619136.

The previous prime is 16931802637. The next prime is 16931802661. The reversal of 16931802640 is 4620813961.

16931802640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-3 number, since 3×16931802640³ (a number of 32 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 16931802593 and 16931802602.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2247810 + ... + 2255329.

It is an arithmetic number, because the mean of its divisors is an integer number (1005100848).

Almost surely, 2^16931802640 is an apocalyptic number.

16931802640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16931802640 is an abundant number, since it is smaller than the sum of its proper divisors (23272231280).

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

16931802640 is a wasteful number, since it uses less digits than its factorization.

16931802640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4503199 (or 4503193 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 40.

The spelling of 16931802640 in words is "sixteen billion, nine hundred thirty-one million, eight hundred two thousand, six hundred forty".