7561320395955 has 16 divisors (see below), whose sum is σ = 12109623707904. Its totient is φ = 4028867186400.

The previous prime is 7561320395911. The next prime is 7561320395971. The reversal of 7561320395955 is 5595930231657.

It is not a de Polignac number, because 7561320395955 - 2⁹ = 7561320395443 is a prime.

It is a super-2 number, since 2×7561320395955² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 239797759 + ... + 239829288.

It is an arithmetic number, because the mean of its divisors is an integer number (756851481744).

Almost surely, 2^{7561320395955} is an apocalyptic number.

7561320395955 is a deficient number, since it is larger than the sum of its proper divisors (4548303311949).

7561320395955 is a wasteful number, since it uses less digits than its factorization.

7561320395955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479628106.

The product of its (nonzero) digits is 38272500, while the sum is 60.

The spelling of 7561320395955 in words is "seven trillion, five hundred sixty-one billion, three hundred twenty million, three hundred ninety-five thousand, nine hundred fifty-five".