7520385961 has 24 divisors (see below), whose sum is σ = 8398512000. Its totient is φ = 6677049600.

The previous prime is 7520385949. The next prime is 7520385973. The reversal of 7520385961 is 1695830257.

It is an interprime number because it is at equal distance from previous prime (7520385949) and next prime (7520385973).

It is a de Polignac number, because none of the positive numbers 2^k-7520385961 is a prime.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7520385911) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31204801 + ... + 31205041.

It is an arithmetic number, because the mean of its divisors is an integer number (349938000).

Almost surely, 2^7520385961 is an apocalyptic number.

It is an amenable number.

7520385961 is a deficient number, since it is larger than the sum of its proper divisors (878126039).

7520385961 is a wasteful number, since it uses less digits than its factorization.

7520385961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 721 (or 480 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 46.

The square root of 7520385961 is about 86720.1589078341. The cubic root of 7520385961 is about 1959.2057347685.

The spelling of 7520385961 in words is "seven billion, five hundred twenty million, three hundred eighty-five thousand, nine hundred sixty-one".