16531215445 has 16 divisors (see below), whose sum is σ = 19958641920. Its totient is φ = 13144420800.

The previous prime is 16531215427. The next prime is 16531215451. The reversal of 16531215445 is 54451213561.

It is not a de Polignac number, because 16531215445 - 2²⁵ = 16497661013 is a prime.

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, 555966 + ... + 584944.

It is an arithmetic number, because the mean of its divisors is an integer number (1247415120).

Almost surely, 2^16531215445 is an apocalyptic number.

It is an amenable number.

16531215445 is a deficient number, since it is larger than the sum of its proper divisors (3427426475).

16531215445 is a wasteful number, since it uses less digits than its factorization.

16531215445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29676.

The product of its digits is 72000, while the sum is 37.

The spelling of 16531215445 in words is "sixteen billion, five hundred thirty-one million, two hundred fifteen thousand, four hundred forty-five".