13971561632 has 24 divisors (see below), whose sum is σ = 31436014176. Its totient is φ = 5987812032.

The previous prime is 13971561613. The next prime is 13971561649. The reversal of 13971561632 is 23616517931.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31186298 + ... + 31186745.

It is an arithmetic number, because the mean of its divisors is an integer number (1309833924).

Almost surely, 2^13971561632 is an apocalyptic number.

It is an amenable number.

13971561632 is an abundant number, since it is smaller than the sum of its proper divisors (17464452544).

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

13971561632 is an equidigital number, since it uses as much as digits as its factorization.

13971561632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62373060 (or 62373052 counting only the distinct ones).

The product of its digits is 204120, while the sum is 44.

The spelling of 13971561632 in words is "thirteen billion, nine hundred seventy-one million, five hundred sixty-one thousand, six hundred thirty-two".