61908885792 has 720 divisors, whose sum is σ = 209987914752. Its totient is φ = 17856184320.

The previous prime is 61908885769. The next prime is 61908885877. The reversal of 61908885792 is 29758880916.

It is a happy number.

61908885792 is a `hidden beast` number, since 619 + 0 + 8 + 8 + 8 + 5 + 7 + 9 + 2 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 638235888 + ... + 638235984.

Almost surely, 2^61908885792 is an apocalyptic number.

61908885792 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61908885792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104993957376).

61908885792 is an abundant number, since it is smaller than the sum of its proper divisors (148079028960).

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

61908885792 is a wasteful number, since it uses less digits than its factorization.

61908885792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223 (or 193 counting only the distinct ones).

The product of its (nonzero) digits is 17418240, while the sum is 63.

The spelling of 61908885792 in words is "sixty-one billion, nine hundred eight million, eight hundred eighty-five thousand, seven hundred ninety-two".