205064757531 has 12 divisors (see below), whose sum is σ = 296209483752. Its totient is φ = 136707607296.

The previous prime is 205064757523. The next prime is 205064757587. The reversal of 205064757531 is 135757460502.

It is a happy number.

205064757531 is a `hidden beast` number, since 2 + 0 + 5 + 0 + 6 + 47 + 575 + 31 = 666.

It is not a de Polignac number, because 205064757531 - 2³ = 205064757523 is a prime.

It is a super-2 number, since 2×205064757531² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (205064757431) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 549160 + ... + 843626.

It is an arithmetic number, because the mean of its divisors is an integer number (24684123646).

Almost surely, 2^205064757531 is an apocalyptic number.

205064757531 is a deficient number, since it is larger than the sum of its proper divisors (91144726221).

205064757531 is a wasteful number, since it uses less digits than its factorization.

205064757531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371850 (or 371847 counting only the distinct ones).

The product of its (nonzero) digits is 882000, while the sum is 45.

The spelling of 205064757531 in words is "two hundred five billion, sixty-four million, seven hundred fifty-seven thousand, five hundred thirty-one".