7715024420864 has 120 divisors (see below), whose sum is σ = 15527980630008. Its totient is φ = 3832964710400.

The previous prime is 7715024420813. The next prime is 7715024420879. The reversal of 7715024420864 is 4680244205177.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 7132061630464 + 582962790400 = 2670592^2 + 763520^2 .

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, 4818877664 + ... + 4818879264.

Almost surely, 2^{7715024420864} 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 7715024420864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7763990315004).

7715024420864 is an abundant number, since it is smaller than the sum of its proper divisors (7812956209144).

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

7715024420864 is a wasteful number, since it uses less digits than its factorization.

7715024420864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3319 (or 3293 counting only the distinct ones).

The product of its (nonzero) digits is 3010560, while the sum is 50.

The spelling of 7715024420864 in words is "seven trillion, seven hundred fifteen billion, twenty-four million, four hundred twenty thousand, eight hundred sixty-four".