715615540 has 24 divisors (see below), whose sum is σ = 1531149480. Its totient is φ = 280844928.

The previous prime is 715615529. The next prime is 715615609. The reversal of 715615540 is 45516517.

It can be written as a sum of positive squares in 4 ways, for example, as 58308496 + 657307044 = 7636^2 + 25638^2 .

It is a junction number, because it is equal to n+sod(n) for n = 715615496 and 715615505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 336495 + ... + 338614.

It is an arithmetic number, because the mean of its divisors is an integer number (63797895).

Almost surely, 2^715615540 is an apocalyptic number.

It is an amenable number.

715615540 is an abundant number, since it is smaller than the sum of its proper divisors (815533940).

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

715615540 is a wasteful number, since it uses less digits than its factorization.

715615540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 675171 (or 675169 counting only the distinct ones).

The product of its (nonzero) digits is 21000, while the sum is 34.

The square root of 715615540 is about 26750.9913834983. The cubic root of 715615540 is about 894.4579346099.

The spelling of 715615540 in words is "seven hundred fifteen million, six hundred fifteen thousand, five hundred forty".