261431271140115 has 16 divisors (see below), whose sum is σ = 418376618505216. Its totient is φ = 139401149714400.

The previous prime is 261431271140089. The next prime is 261431271140129. The reversal of 261431271140115 is 511041172134162.

261431271140115 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 261431271140115 - 2¹² = 261431271136019 is a prime.

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, 1803772641 + ... + 1803917570.

It is an arithmetic number, because the mean of its divisors is an integer number (26148538656576).

Almost surely, 2^{261431271140115} is an apocalyptic number.

261431271140115 is a deficient number, since it is larger than the sum of its proper divisors (156945347365101).

261431271140115 is a wasteful number, since it uses less digits than its factorization.

261431271140115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3607695050.

The product of its (nonzero) digits is 40320, while the sum is 39.

The spelling of 261431271140115 in words is "two hundred sixty-one trillion, four hundred thirty-one billion, two hundred seventy-one million, one hundred forty thousand, one hundred fifteen".