16531870655 has 16 divisors (see below), whose sum is σ = 21260263104. Its totient is φ = 12308567040.

The previous prime is 16531870591. The next prime is 16531870669. The reversal of 16531870655 is 55607813561.

It is not a de Polignac number, because 16531870655 - 2⁶ = 16531870591 is a prime.

It is a Duffinian number.

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, 1938386 + ... + 1946895.

It is an arithmetic number, because the mean of its divisors is an integer number (1328766444).

Almost surely, 2^16531870655 is an apocalyptic number.

16531870655 is a deficient number, since it is larger than the sum of its proper divisors (4728392449).

16531870655 is a wasteful number, since it uses less digits than its factorization.

16531870655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3885346.

The product of its (nonzero) digits is 756000, while the sum is 47.

The spelling of 16531870655 in words is "sixteen billion, five hundred thirty-one million, eight hundred seventy thousand, six hundred fifty-five".