16509901086 has 64 divisors (see below), whose sum is σ = 43375795200. Its totient is φ = 4554452448.

The previous prime is 16509901019. The next prime is 16509901139. The reversal of 16509901086 is 68010990561.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 742090 + ... + 764013.

It is an arithmetic number, because the mean of its divisors is an integer number (677746800).

Almost surely, 2^16509901086 is an apocalyptic number.

16509901086 is an abundant number, since it is smaller than the sum of its proper divisors (26865894114).

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

16509901086 is a wasteful number, since it uses less digits than its factorization.

16509901086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1506150 (or 1506144 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 45.

The spelling of 16509901086 in words is "sixteen billion, five hundred nine million, nine hundred one thousand, eighty-six".