261431274522052 has 12 divisors (see below), whose sum is σ = 457616562446736. Its totient is φ = 130683685251560.

The previous prime is 261431274521959. The next prime is 261431274522083. The reversal of 261431274522052 is 250225472134162.

It is a super-2 number, since 2×261431274522052² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 261431274521993 and 261431274522011.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7987983958 + ... + 7988016685.

It is an arithmetic number, because the mean of its divisors is an integer number (38134713537228).

Almost surely, 2^{261431274522052} is an apocalyptic number.

It is an amenable number.

261431274522052 is a deficient number, since it is larger than the sum of its proper divisors (196185287924684).

261431274522052 is a wasteful number, since it uses less digits than its factorization.

261431274522052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15976004738 (or 15976004736 counting only the distinct ones).

The product of its (nonzero) digits is 1612800, while the sum is 46.

The spelling of 261431274522052 in words is "two hundred sixty-one trillion, four hundred thirty-one billion, two hundred seventy-four million, five hundred twenty-two thousand, fifty-two".