61231512312 has 48 divisors (see below), whose sum is σ = 167833378440. Its totient is φ = 20164592448.

The previous prime is 61231512301. The next prime is 61231512317. The reversal of 61231512312 is 21321513216.

61231512312 is a `hidden beast` number, since 612 + 3 + 1 + 5 + 12 + 31 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61231512317) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5117143 + ... + 5129094.

Almost surely, 2^61231512312 is an apocalyptic number.

It is an amenable number.

61231512312 is an abundant number, since it is smaller than the sum of its proper divisors (106601866128).

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

61231512312 is a wasteful number, since it uses less digits than its factorization.

61231512312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10246332 (or 10246325 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The spelling of 61231512312 in words is "sixty-one billion, two hundred thirty-one million, five hundred twelve thousand, three hundred twelve".