61657538632 has 16 divisors (see below), whose sum is σ = 116344243260. Its totient is φ = 30632407104.

The previous prime is 61657538623. The next prime is 61657538669. The reversal of 61657538632 is 23683575616.

It can be written as a sum of positive squares in 2 ways, for example, as 61645937796 + 11600836 = 248286^2 + 3406^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 61657538632.

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, 24543943 + ... + 24546454.

Almost surely, 2^61657538632 is an apocalyptic number.

It is an amenable number.

61657538632 is a deficient number, since it is larger than the sum of its proper divisors (54686704628).

61657538632 is a wasteful number, since it uses less digits than its factorization.

61657538632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49090560 (or 49090556 counting only the distinct ones).

The product of its digits is 5443200, while the sum is 52.

The spelling of 61657538632 in words is "sixty-one billion, six hundred fifty-seven million, five hundred thirty-eight thousand, six hundred thirty-two".