15611982552 has 64 divisors (see below), whose sum is σ = 43410204000. Its totient is φ = 5198764032.

The previous prime is 15611982539. The next prime is 15611982557. The reversal of 15611982552 is 25528911651.

15611982552 is a `hidden beast` number, since 1 + 5 + 6 + 1 + 1 + 98 + 2 + 552 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 15611982498 and 15611982507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15611982557) 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, 182128 + ... + 253760.

Almost surely, 2^15611982552 is an apocalyptic number.

15611982552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

15611982552 is an abundant number, since it is smaller than the sum of its proper divisors (27798221448).

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

15611982552 is a wasteful number, since it uses less digits than its factorization.

15611982552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72657 (or 72647 counting only the distinct ones).

The product of its digits is 216000, while the sum is 45.

The spelling of 15611982552 in words is "fifteen billion, six hundred eleven million, nine hundred eighty-two thousand, five hundred fifty-two".