16531061144 has 32 divisors (see below), whose sum is σ = 33385595040. Its totient is φ = 7628448000.

The previous prime is 16531061047. The next prime is 16531061153. The reversal of 16531061144 is 44116013561.

It is a self number, because there is not a number n which added to its sum of digits gives 16531061144.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 944069 + ... + 961419.

It is an arithmetic number, because the mean of its divisors is an integer number (1043299845).

Almost surely, 2^16531061144 is an apocalyptic number.

It is an amenable number.

16531061144 is an abundant number, since it is smaller than the sum of its proper divisors (16854533896).

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

16531061144 is a wasteful number, since it uses less digits than its factorization.

16531061144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26531 (or 26527 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 32.

The spelling of 16531061144 in words is "sixteen billion, five hundred thirty-one million, sixty-one thousand, one hundred forty-four".