261655502027612 has 48 divisors (see below), whose sum is σ = 574520940284928. Its totient is φ = 101294379126720.

The previous prime is 261655502027593. The next prime is 261655502027681. The reversal of 261655502027612 is 216720205556162.

It is a congruent number.

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, 2705463908 + ... + 2705560619.

It is an arithmetic number, because the mean of its divisors is an integer number (11969186255936).

Almost surely, 2^{261655502027612} is an apocalyptic number.

261655502027612 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

261655502027612 is an abundant number, since it is smaller than the sum of its proper divisors (312865438257316).

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

261655502027612 is a wasteful number, since it uses less digits than its factorization.

261655502027612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5411024706 (or 5411024704 counting only the distinct ones).

The product of its (nonzero) digits is 3024000, while the sum is 50.

The spelling of 261655502027612 in words is "two hundred sixty-one trillion, six hundred fifty-five billion, five hundred two million, twenty-seven thousand, six hundred twelve".