61285694720 has 288 divisors, whose sum is σ = 158916912000. Its totient is φ = 22574039040.

The previous prime is 61285694707. The next prime is 61285694731. The reversal of 61285694720 is 2749658216.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 161703491 + ... + 161703869.

Almost surely, 2^61285694720 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 61285694720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79458456000).

61285694720 is an abundant number, since it is smaller than the sum of its proper divisors (97631217280).

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

61285694720 is a wasteful number, since it uses less digits than its factorization.

61285694720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 589 (or 575 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 50.

The spelling of 61285694720 in words is "sixty-one billion, two hundred eighty-five million, six hundred ninety-four thousand, seven hundred twenty".