16465880864808 has 48 divisors (see below), whose sum is σ = 44612783946900. Its totient is φ = 5486449731840.

The previous prime is 16465880864803. The next prime is 16465880864819. The reversal of 16465880864808 is 80846808856461.

16465880864808 is a `hidden beast` number, since 1 + 6 + 4 + 65 + 8 + 8 + 0 + 86 + 480 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 15777880291044 + 688000573764 = 3972138^2 + 829458^2 .

It is a super-2 number, since 2×16465880864808² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is not an unprimeable number, because it can be changed into a prime (16465880864803) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45176043 + ... + 45539066.

Almost surely, 2^{16465880864808} is an apocalyptic number.

16465880864808 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

16465880864808 is an abundant number, since it is smaller than the sum of its proper divisors (28146903082092).

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

16465880864808 is a wasteful number, since it uses less digits than its factorization.

16465880864808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90717642 (or 90717635 counting only the distinct ones).

The product of its (nonzero) digits is 566231040, while the sum is 72.

The spelling of 16465880864808 in words is "sixteen trillion, four hundred sixty-five billion, eight hundred eighty million, eight hundred sixty-four thousand, eight hundred eight".