16505507372 has 24 divisors (see below), whose sum is σ = 29158764096. Its totient is φ = 8174694528.

The previous prime is 16505507287. The next prime is 16505507399. The reversal of 16505507372 is 27370550561.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 221198 + ... + 286250.

It is an arithmetic number, because the mean of its divisors is an integer number (1214948504).

Almost surely, 2^16505507372 is an apocalyptic number.

It is an amenable number.

16505507372 is a deficient number, since it is larger than the sum of its proper divisors (12653256724).

16505507372 is a wasteful number, since it uses less digits than its factorization.

16505507372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65657 (or 65655 counting only the distinct ones).

The product of its (nonzero) digits is 220500, while the sum is 41.

The spelling of 16505507372 in words is "sixteen billion, five hundred five million, five hundred seven thousand, three hundred seventy-two".