261250265015522 has 16 divisors (see below), whose sum is σ = 400214646565632. Its totient is φ = 127845403308000.

The previous prime is 261250265015503. The next prime is 261250265015573. The reversal of 261250265015522 is 225510562052162.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21245363 + ... + 31206825.

It is an arithmetic number, because the mean of its divisors is an integer number (25013415410352).

Almost surely, 2^{261250265015522} is an apocalyptic number.

261250265015522 is a deficient number, since it is larger than the sum of its proper divisors (138964381550110).

261250265015522 is a wasteful number, since it uses less digits than its factorization.

261250265015522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10240513.

The product of its (nonzero) digits is 720000, while the sum is 44.

The spelling of 261250265015522 in words is "two hundred sixty-one trillion, two hundred fifty billion, two hundred sixty-five million, fifteen thousand, five hundred twenty-two".