61931962368 has 300 divisors, whose sum is σ = 193165397040. Its totient is φ = 19736690688.

The previous prime is 61931962363. The next prime is 61931962397. The reversal of 61931962368 is 86326913916.

61931962368 is a `hidden beast` number, since 6 + 1 + 9 + 3 + 1 + 9 + 623 + 6 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (61931962363) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 30522378 + ... + 30524406.

Almost surely, 2^61931962368 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61931962368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96582698520).

61931962368 is an abundant number, since it is smaller than the sum of its proper divisors (131233434672).

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

61931962368 is an equidigital number, since it uses as much as digits as its factorization.

61931962368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2092 (or 2057 counting only the distinct ones).

The product of its digits is 2519424, while the sum is 54.

The spelling of 61931962368 in words is "sixty-one billion, nine hundred thirty-one million, nine hundred sixty-two thousand, three hundred sixty-eight".