261432122355 has 24 divisors (see below), whose sum is σ = 457635643920. Its totient is φ = 138049963200.

The previous prime is 261432122351. The next prime is 261432122383. The reversal of 261432122355 is 553221234162.

261432122355 is a `hidden beast` number, since 2 + 61 + 4 + 321 + 223 + 55 = 666.

It is not a de Polignac number, because 261432122355 - 2² = 261432122351 is a prime.

It is not an unprimeable number, because it can be changed into a prime (261432122351) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28755865 + ... + 28764954.

It is an arithmetic number, because the mean of its divisors is an integer number (19068151830).

Almost surely, 2^261432122355 is an apocalyptic number.

261432122355 is a deficient number, since it is larger than the sum of its proper divisors (196203521565).

261432122355 is a wasteful number, since it uses less digits than its factorization.

261432122355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57520931 (or 57520928 counting only the distinct ones).

The product of its digits is 86400, while the sum is 36.

The spelling of 261432122355 in words is "two hundred sixty-one billion, four hundred thirty-two million, one hundred twenty-two thousand, three hundred fifty-five".