261430421257304 has 16 divisors (see below), whose sum is σ = 527888350615920. Its totient is φ = 120660194426400.

The previous prime is 261430421257297. The next prime is 261430421257351. The reversal of 261430421257304 is 403752124034162.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1256877025172 + ... + 1256877025379.

It is an arithmetic number, because the mean of its divisors is an integer number (32993021913495).

Almost surely, 2^{261430421257304} is an apocalyptic number.

It is an amenable number.

261430421257304 is an abundant number, since it is smaller than the sum of its proper divisors (266457929358616).

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

261430421257304 is a wasteful number, since it uses less digits than its factorization.

261430421257304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2513754050570 (or 2513754050566 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 44.

The spelling of 261430421257304 in words is "two hundred sixty-one trillion, four hundred thirty billion, four hundred twenty-one million, two hundred fifty-seven thousand, three hundred four".