61163431232 has 28 divisors (see below), whose sum is σ = 128510667540. Its totient is φ = 28782790656.

The previous prime is 61163431207. The next prime is 61163431289. The reversal of 61163431232 is 23213436116.

It can be written as a sum of positive squares in 2 ways, for example, as 52561981696 + 8601449536 = 229264^2 + 92744^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

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, 28107107 + ... + 28109282.

Almost surely, 2^61163431232 is an apocalyptic number.

It is an amenable number.

61163431232 is an abundant number, since it is smaller than the sum of its proper divisors (67347236308).

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

61163431232 is a wasteful number, since it uses less digits than its factorization.

61163431232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56216418 (or 56216408 counting only the distinct ones).

The product of its digits is 15552, while the sum is 32.

Adding to 61163431232 its reverse (23213436116), we get a palindrome (84376867348).

The spelling of 61163431232 in words is "sixty-one billion, one hundred sixty-three million, four hundred thirty-one thousand, two hundred thirty-two".