61715437056 has 1120 divisors, whose sum is σ = 240444610560. Its totient is φ = 15371845632.

The previous prime is 61715437039. The next prime is 61715437067. The reversal of 61715437056 is 65073451716.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 781208025 + ... + 781208103.

It is an arithmetic number, because the mean of its divisors is an integer number (214682688).

Almost surely, 2^61715437056 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 61715437056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120222305280).

61715437056 is an abundant number, since it is smaller than the sum of its proper divisors (178729173504).

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

61715437056 is an equidigital number, since it uses as much as digits as its factorization.

61715437056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158 (or 127 counting only the distinct ones).

The product of its (nonzero) digits is 529200, while the sum is 45.

The spelling of 61715437056 in words is "sixty-one billion, seven hundred fifteen million, four hundred thirty-seven thousand, fifty-six".