715615979520 has 768 divisors, whose sum is σ = 2593554163200. Its totient is φ = 168127365120.

The previous prime is 715615979509. The next prime is 715615979539. The reversal of 715615979520 is 25979516517.

It is a tau number, because it is divible by the number of its divisors (768).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1552312090 + ... + 1552312550.

It is an arithmetic number, because the mean of its divisors is an integer number (3377023650).

Almost surely, 2^715615979520 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 715615979520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1296777081600).

715615979520 is an abundant number, since it is smaller than the sum of its proper divisors (1877938183680).

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

715615979520 is a wasteful number, since it uses less digits than its factorization.

715615979520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553 (or 507 counting only the distinct ones).

The product of its (nonzero) digits is 5953500, while the sum is 57.

The spelling of 715615979520 in words is "seven hundred fifteen billion, six hundred fifteen million, nine hundred seventy-nine thousand, five hundred twenty".