15655332672 has 560 divisors, whose sum is σ = 55390044160. Its totient is φ = 4279661568.

The previous prime is 15655332643. The next prime is 15655332709. The reversal of 15655332672 is 27623355651.

15655332672 is a `hidden beast` number, since 1 + 5 + 6 + 553 + 3 + 26 + 72 = 666.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

Its product of digits (1134000) is a multiple of the sum of its prime factors (280).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 123270273 + ... + 123270399.

Almost surely, 2^15655332672 is an apocalyptic number.

15655332672 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15655332672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27695022080).

15655332672 is an abundant number, since it is smaller than the sum of its proper divisors (39734711488).

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

15655332672 is a wasteful number, since it uses less digits than its factorization.

15655332672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280 (or 261 counting only the distinct ones).

The product of its digits is 1134000, while the sum is 45.

It can be divided in two parts, 156553 and 32672, that added together give a square (189225 = 435²).

The spelling of 15655332672 in words is "fifteen billion, six hundred fifty-five million, three hundred thirty-two thousand, six hundred seventy-two".