61810995792 has 320 divisors, whose sum is σ = 206366791680. Its totient is φ = 15502620672.

The previous prime is 61810995791. The next prime is 61810995809. The reversal of 61810995792 is 29759901816.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61810995791) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8483383 + ... + 8490665.

It is an arithmetic number, because the mean of its divisors is an integer number (644896224).

Almost surely, 2^61810995792 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 61810995792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103183395840).

61810995792 is an abundant number, since it is smaller than the sum of its proper divisors (144555795888).

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

61810995792 is a wasteful number, since it uses less digits than its factorization.

61810995792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7410 (or 7404 counting only the distinct ones).

The product of its (nonzero) digits is 2449440, while the sum is 57.

The spelling of 61810995792 in words is "sixty-one billion, eight hundred ten million, nine hundred ninety-five thousand, seven hundred ninety-two".