261204027795 has 12 divisors (see below), whose sum is σ = 452753648256. Its totient is φ = 139308814800.

The previous prime is 261204027767. The next prime is 261204027839. The reversal of 261204027795 is 597720402162.

261204027795 is a `hidden beast` number, since 2 + 612 + 0 + 4 + 0 + 27 + 7 + 9 + 5 = 666.

It is not a de Polignac number, because 261204027795 - 2²² = 261199833491 is a prime.

It is a super-2 number, since 2×261204027795² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 5804533951 = 261204027795 / (2 + 6 + 1 + 2 + 0 + 4 + 0 + 2 + 7 + 7 + 9 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 261204027795.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2902266931 + ... + 2902267020.

It is an arithmetic number, because the mean of its divisors is an integer number (37729470688).

Almost surely, 2^261204027795 is an apocalyptic number.

261204027795 is a deficient number, since it is larger than the sum of its proper divisors (191549620461).

261204027795 is a wasteful number, since it uses less digits than its factorization.

261204027795 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5804533962 (or 5804533959 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 45.

The spelling of 261204027795 in words is "two hundred sixty-one billion, two hundred four million, twenty-seven thousand, seven hundred ninety-five".