16477996816 has 10 divisors (see below), whose sum is σ = 31926118862. Its totient is φ = 8238998400.

The previous prime is 16477996709. The next prime is 16477996837. The reversal of 16477996816 is 61869977461.

It can be written as a sum of positive squares in only one way, i.e., 15327430416 + 1150566400 = 123804^2 + 33920^2 .

It is a super-2 number, since 2×16477996816² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 514937385 + ... + 514937416.

Almost surely, 2^16477996816 is an apocalyptic number.

16477996816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

16477996816 is a deficient number, since it is larger than the sum of its proper divisors (15448122046).

16477996816 is a wasteful number, since it uses less digits than its factorization.

16477996816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1029874809 (or 1029874803 counting only the distinct ones).

The product of its digits is 27433728, while the sum is 64.

The spelling of 16477996816 in words is "sixteen billion, four hundred seventy-seven million, nine hundred ninety-six thousand, eight hundred sixteen".