261560531365452 has 108 divisors (see below), whose sum is σ = 726744108436528. Its totient is φ = 79260010315200.

The previous prime is 261560531365421. The next prime is 261560531365459. The reversal of 261560531365452 is 254563135065162.

261560531365452 is a `hidden beast` number, since 2 + 6 + 1 + 5 + 6 + 0 + 53 + 136 + 5 + 452 = 666.

It is not an unprimeable number, because it can be changed into a prime (261560531365459) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 600522618 + ... + 600958014.

Almost surely, 2^{261560531365452} is an apocalyptic number.

261560531365452 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

261560531365452 is an abundant number, since it is smaller than the sum of its proper divisors (465183577071076).

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

261560531365452 is a wasteful number, since it uses less digits than its factorization.

261560531365452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 573340 (or 573324 counting only the distinct ones).

The product of its (nonzero) digits is 19440000, while the sum is 54.

The spelling of 261560531365452 in words is "two hundred sixty-one trillion, five hundred sixty billion, five hundred thirty-one million, three hundred sixty-five thousand, four hundred fifty-two".