261535051313046 has 48 divisors (see below), whose sum is σ = 647634117731328. Its totient is φ = 74721587166000.

The previous prime is 261535051312967. The next prime is 261535051313087. The reversal of 261535051313046 is 640313150535162.

261535051313046 is a `hidden beast` number, since 2 + 6 + 1 + 5 + 3 + 505 + 1 + 3 + 130 + 4 + 6 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 261535051312992 and 261535051313010.

It is a congruent number.

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, 34198260 + ... + 41141111.

It is an arithmetic number, because the mean of its divisors is an integer number (13492377452736).

Almost surely, 2^{261535051313046} is an apocalyptic number.

261535051313046 is an abundant number, since it is smaller than the sum of its proper divisors (386099066418282).

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

261535051313046 is a wasteful number, since it uses less digits than its factorization.

261535051313046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75366937 (or 75366934 counting only the distinct ones).

The product of its (nonzero) digits is 972000, while the sum is 45.

The spelling of 261535051313046 in words is "two hundred sixty-one trillion, five hundred thirty-five billion, fifty-one million, three hundred thirteen thousand, forty-six".