15612216660 has 72 divisors (see below), whose sum is σ = 47381976096. Its totient is φ = 4161067200.

The previous prime is 15612216623. The next prime is 15612216709. The reversal of 15612216660 is 6661221651.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 335835 + ... + 379485.

Almost surely, 2^15612216660 is an apocalyptic number.

15612216660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15612216660 is an abundant number, since it is smaller than the sum of its proper divisors (31769759436).

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

15612216660 is a wasteful number, since it uses less digits than its factorization.

15612216660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45653 (or 45648 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The spelling of 15612216660 in words is "fifteen billion, six hundred twelve million, two hundred sixteen thousand, six hundred sixty".