7520138757 has 24 divisors (see below), whose sum is σ = 11013789696. Its totient is φ = 4944040416.

The previous prime is 7520138713. The next prime is 7520138767. The reversal of 7520138757 is 7578310257.

It is not a de Polignac number, because 7520138757 - 2⁸ = 7520138501 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7520138707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 171183 + ... + 210579.

It is an arithmetic number, because the mean of its divisors is an integer number (458907904).

Almost surely, 2^7520138757 is an apocalyptic number.

It is an amenable number.

7520138757 is a deficient number, since it is larger than the sum of its proper divisors (3493650939).

7520138757 is a wasteful number, since it uses less digits than its factorization.

7520138757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39697 (or 39694 counting only the distinct ones).

The product of its (nonzero) digits is 411600, while the sum is 45.

The square root of 7520138757 is about 86718.7335989174. The cubic root of 7520138757 is about 1959.1842673951.

The spelling of 7520138757 in words is "seven billion, five hundred twenty million, one hundred thirty-eight thousand, seven hundred fifty-seven".