61457044992 has 480 divisors, whose sum is σ = 202614397920. Its totient is φ = 16473784320.

The previous prime is 61457044967. The next prime is 61457045003. The reversal of 61457044992 is 29944075416.

It is a congruent number.

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, 80757892 + ... + 80758652.

It is an arithmetic number, because the mean of its divisors is an integer number (422113329).

Almost surely, 2^61457044992 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 61457044992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101307198960).

61457044992 is an abundant number, since it is smaller than the sum of its proper divisors (141157352928).

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

61457044992 is a wasteful number, since it uses less digits than its factorization.

61457044992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 862 (or 839 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 51.

The spelling of 61457044992 in words is "sixty-one billion, four hundred fifty-seven million, forty-four thousand, nine hundred ninety-two".