261431270613675 has 36 divisors (see below), whose sum is σ = 470704037192064. Its totient is φ = 138700010913600.

The previous prime is 261431270613671. The next prime is 261431270613743. The reversal of 261431270613675 is 576316072134162.

261431270613675 is a `hidden beast` number, since 2 + 6 + 1 + 4 + 3 + 1 + 270 + 6 + 1 + 367 + 5 = 666.

It is not a de Polignac number, because 261431270613675 - 2² = 261431270613671 is a prime.

It is a super-2 number, since 2×261431270613675² (a number of 30 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (261431270613671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 3041623932 + ... + 3041709881.

It is an arithmetic number, because the mean of its divisors is an integer number (13075112144224).

Almost surely, 2^{261431270613675} is an apocalyptic number.

261431270613675 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

261431270613675 is a deficient number, since it is larger than the sum of its proper divisors (209272766578389).

261431270613675 is a wasteful number, since it uses less digits than its factorization.

261431270613675 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6083334020 (or 6083334012 counting only the distinct ones).

The product of its (nonzero) digits is 7620480, while the sum is 54.

The spelling of 261431270613675 in words is "two hundred sixty-one trillion, four hundred thirty-one billion, two hundred seventy million, six hundred thirteen thousand, six hundred seventy-five".