261576121364 has 12 divisors (see below), whose sum is σ = 458571285984. Its totient is φ = 130555753944.

The previous prime is 261576121361. The next prime is 261576121393. The reversal of 261576121364 is 463121675162.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261576121361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58074152 + ... + 58078655.

It is an arithmetic number, because the mean of its divisors is an integer number (38214273832).

Almost surely, 2^261576121364 is an apocalyptic number.

It is an amenable number.

261576121364 is a deficient number, since it is larger than the sum of its proper divisors (196995164620).

261576121364 is a wasteful number, since it uses less digits than its factorization.

261576121364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116153374 (or 116153372 counting only the distinct ones).

The product of its digits is 362880, while the sum is 44.

The spelling of 261576121364 in words is "two hundred sixty-one billion, five hundred seventy-six million, one hundred twenty-one thousand, three hundred sixty-four".