61318920432 has 80 divisors (see below), whose sum is σ = 197494716672. Its totient is φ = 15926991360.

The previous prime is 61318920431. The next prime is 61318920451. The reversal of 61318920432 is 23402981316.

61318920432 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61318920431) 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, 8291613 + ... + 8299004.

Almost surely, 2^61318920432 is an apocalyptic number.

It is an amenable number.

61318920432 is an abundant number, since it is smaller than the sum of its proper divisors (136175796240).

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

61318920432 is a wasteful number, since it uses less digits than its factorization.

61318920432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16590646 (or 16590640 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 39.

The spelling of 61318920432 in words is "sixty-one billion, three hundred eighteen million, nine hundred twenty thousand, four hundred thirty-two".