261440711360604 has 96 divisors (see below), whose sum is σ = 680907999340800. Its totient is φ = 86748899832000.

The previous prime is 261440711360599. The next prime is 261440711360657. The reversal of 261440711360604 is 406063117044162.

261440711360604 is a `hidden beast` number, since 2 + 6 + 1 + 4 + 4 + 0 + 7 + 1 + 1 + 36 + 0 + 604 = 666.

261440711360604 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 261440711360604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43505919 + ... + 49149225.

It is an arithmetic number, because the mean of its divisors is an integer number (7092791659800).

Almost surely, 2^{261440711360604} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 261440711360604, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (340453999670400).

261440711360604 is an abundant number, since it is smaller than the sum of its proper divisors (419467287980196).

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

261440711360604 is a wasteful number, since it uses less digits than its factorization.

261440711360604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5645280 (or 5645272 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 45.

The spelling of 261440711360604 in words is "two hundred sixty-one trillion, four hundred forty billion, seven hundred eleven million, three hundred sixty thousand, six hundred four".