16465661646 has 32 divisors (see below), whose sum is σ = 37639633920. Its totient is φ = 4703995296.

The previous prime is 16465661603. The next prime is 16465661651. The reversal of 16465661646 is 64616656461.

It is a super-2 number, since 2×16465661646² (a number of 21 digits) contains 22 as substring.

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, 715995 + ... + 738633.

It is an arithmetic number, because the mean of its divisors is an integer number (1176238560).

Almost surely, 2^16465661646 is an apocalyptic number.

16465661646 is an abundant number, since it is smaller than the sum of its proper divisors (21173972274).

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

16465661646 is a wasteful number, since it uses less digits than its factorization.

16465661646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39968.

The product of its digits is 3732480, while the sum is 51.

The spelling of 16465661646 in words is "sixteen billion, four hundred sixty-five million, six hundred sixty-one thousand, six hundred forty-six".