7502720013 has 36 divisors (see below), whose sum is σ = 11370488220. Its totient is φ = 4949828352.

The previous prime is 7502720009. The next prime is 7502720033. The reversal of 7502720013 is 3100272057.

It can be written as a sum of positive squares in 2 ways, for example, as 1430881929 + 6071838084 = 37827^2 + 77922^2 .

It is not a de Polignac number, because 7502720013 - 2² = 7502720009 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7502720033) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 630523 + ... + 642311.

It is an arithmetic number, because the mean of its divisors is an integer number (315846895).

Almost surely, 2^7502720013 is an apocalyptic number.

It is an amenable number.

7502720013 is a deficient number, since it is larger than the sum of its proper divisors (3867768207).

7502720013 is an frugal number, since it uses more digits than its factorization.

7502720013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11910 (or 11889 counting only the distinct ones).

The product of its (nonzero) digits is 2940, while the sum is 27.

The square root of 7502720013 is about 86618.2429572431. The cubic root of 7502720013 is about 1957.6704251143.

The spelling of 7502720013 in words is "seven billion, five hundred two million, seven hundred twenty thousand, thirteen".