7520408065 has 8 divisors (see below), whose sum is σ = 9555342120. Its totient is φ = 5662424832.

The previous prime is 7520408059. The next prime is 7520408089. The reversal of 7520408065 is 5608040257.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1063803456 + 6456604609 = 32616^2 + 80353^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 7520408065 - 2⁵ = 7520408033 is a prime.

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, 44237610 + ... + 44237779.

It is an arithmetic number, because the mean of its divisors is an integer number (1194417765).

Almost surely, 2^7520408065 is an apocalyptic number.

It is an amenable number.

7520408065 is a deficient number, since it is larger than the sum of its proper divisors (2034934055).

7520408065 is a wasteful number, since it uses less digits than its factorization.

7520408065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88475411.

The product of its (nonzero) digits is 67200, while the sum is 37.

The square root of 7520408065 is about 86720.2863521564. The cubic root of 7520408065 is about 1959.2076542729.

The spelling of 7520408065 in words is "seven billion, five hundred twenty million, four hundred eight thousand, sixty-five".