15555555672 has 64 divisors (see below), whose sum is σ = 39420172800. Its totient is φ = 5114478720.

The previous prime is 15555555671. The next prime is 15555555727. The reversal of 15555555672 is 27655555551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15555555671) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2235703 + ... + 2242649.

It is an arithmetic number, because the mean of its divisors is an integer number (615940200).

Almost surely, 2^15555555672 is an apocalyptic number.

15555555672 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

15555555672 is an abundant number, since it is smaller than the sum of its proper divisors (23864617128).

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

15555555672 is a wasteful number, since it uses less digits than its factorization.

15555555672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8216 (or 8212 counting only the distinct ones).

The product of its digits is 6562500, while the sum is 51.

The spelling of 15555555672 in words is "fifteen billion, five hundred fifty-five million, five hundred fifty-five thousand, six hundred seventy-two".