16931459465 has 4 divisors (see below), whose sum is σ = 20317751364. Its totient is φ = 13545167568.

The previous prime is 16931459437. The next prime is 16931459483. The reversal of 16931459465 is 56495413961.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2297476624 + 14633982841 = 47932^2 + 120971^2 .

It is a cyclic number.

It is not a de Polignac number, because 16931459465 - 2⁶ = 16931459401 is a prime.

It is a super-2 number, since 2×16931459465² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon 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, 1693145942 + ... + 1693145951.

It is an arithmetic number, because the mean of its divisors is an integer number (5079437841).

Almost surely, 2^16931459465 is an apocalyptic number.

It is an amenable number.

16931459465 is a deficient number, since it is larger than the sum of its proper divisors (3386291899).

16931459465 is an equidigital number, since it uses as much as digits as its factorization.

16931459465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3386291898.

The product of its digits is 3499200, while the sum is 53.

The spelling of 16931459465 in words is "sixteen billion, nine hundred thirty-one million, four hundred fifty-nine thousand, four hundred sixty-five".