261655544327112 has 96 divisors (see below), whose sum is σ = 763205480364600. Its totient is φ = 80504811767808.

The previous prime is 261655544327059. The next prime is 261655544327123. The reversal of 261655544327112 is 211723445556162.

261655544327112 is a `hidden beast` number, since 2 + 6 + 1 + 6 + 5 + 554 + 4 + 3 + 2 + 71 + 12 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 190867653416196 + 70787890910916 = 13815486^2 + 8413554^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8494464 + ... + 24402192.

Almost surely, 2^{261655544327112} is an apocalyptic number.

It is an amenable number.

261655544327112 is an abundant number, since it is smaller than the sum of its proper divisors (501549936037488).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

261655544327112 is a wasteful number, since it uses less digits than its factorization.

261655544327112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15925327 (or 15925320 counting only the distinct ones).

The product of its digits is 12096000, while the sum is 54.

The spelling of 261655544327112 in words is "two hundred sixty-one trillion, six hundred fifty-five billion, five hundred forty-four million, three hundred twenty-seven thousand, one hundred twelve".