261360090611154 has 192 divisors, whose sum is σ = 593810684812800. Its totient is φ = 82971415296000.

The previous prime is 261360090611119. The next prime is 261360090611273. The reversal of 261360090611154 is 451116090063162.

261360090611154 is a `hidden beast` number, since 2 + 6 + 13 + 6 + 0 + 0 + 9 + 0 + 611 + 15 + 4 = 666.

It is a super-2 number, since 2×261360090611154² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 52240671217 + ... + 52240676219.

It is an arithmetic number, because the mean of its divisors is an integer number (3092763983400).

Almost surely, 2^{261360090611154} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 261360090611154, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (296905342406400).

261360090611154 is an abundant number, since it is smaller than the sum of its proper divisors (332450594201646).

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

261360090611154 is a wasteful number, since it uses less digits than its factorization.

261360090611154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7601 (or 7598 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The spelling of 261360090611154 in words is "two hundred sixty-one trillion, three hundred sixty billion, ninety million, six hundred eleven thousand, one hundred fifty-four".