7368713521 has 8 divisors (see below), whose sum is σ = 7939800680. Its totient is φ = 6798235392.

The previous prime is 7368713507. The next prime is 7368713557. The reversal of 7368713521 is 1253178637.

It can be written as a sum of positive squares in 4 ways, for example, as 147962896 + 7220750625 = 12164^2 + 84975^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7368713521 - 2¹¹ = 7368711473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7368713591) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126966 + ... + 175663.

It is an arithmetic number, because the mean of its divisors is an integer number (992475085).

Almost surely, 2^7368713521 is an apocalyptic number.

It is an amenable number.

7368713521 is a deficient number, since it is larger than the sum of its proper divisors (571087159).

7368713521 is a wasteful number, since it uses less digits than its factorization.

7368713521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304515.

The product of its digits is 211680, while the sum is 43.

The square root of 7368713521 is about 85841.2110876821. The cubic root of 7368713521 is about 1945.9449831410.

The spelling of 7368713521 in words is "seven billion, three hundred sixty-eight million, seven hundred thirteen thousand, five hundred twenty-one".