61306979328 has 528 divisors, whose sum is σ = 213613522304. Its totient is φ = 17199267840.

The previous prime is 61306979311. The next prime is 61306979369. The reversal of 61306979328 is 82397960316.

61306979328 is a `hidden beast` number, since 6 + 1 + 306 + 9 + 7 + 9 + 328 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 106250976 + ... + 106251552.

Almost surely, 2^61306979328 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 61306979328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106806761152).

61306979328 is an abundant number, since it is smaller than the sum of its proper divisors (152306542976).

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

61306979328 is an equidigital number, since it uses as much as digits as its factorization.

61306979328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 680 (or 650 counting only the distinct ones).

The product of its (nonzero) digits is 2939328, while the sum is 54.

The spelling of 61306979328 in words is "sixty-one billion, three hundred six million, nine hundred seventy-nine thousand, three hundred twenty-eight".