261430604425325 has 12 divisors (see below), whose sum is σ = 324194554688148. Its totient is φ = 209131189862400.

The previous prime is 261430604425313. The next prime is 261430604425351. The reversal of 261430604425325 is 523524406034162.

It can be written as a sum of positive squares in 6 ways, for example, as 111115084360996 + 150315520064329 = 10541114^2 + 12260323^2 .

It is not a de Polignac number, because 261430604425325 - 2²⁶ = 261430537316461 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 261430604425325.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 331940756 + ... + 332727405.

It is an arithmetic number, because the mean of its divisors is an integer number (27016212890679).

Almost surely, 2^{261430604425325} is an apocalyptic number.

261430604425325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

261430604425325 is a deficient number, since it is larger than the sum of its proper divisors (62763950262823).

261430604425325 is a wasteful number, since it uses less digits than its factorization.

261430604425325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664683904 (or 664683899 counting only the distinct ones).

The product of its (nonzero) digits is 4147200, while the sum is 47.

The spelling of 261430604425325 in words is "two hundred sixty-one trillion, four hundred thirty billion, six hundred four million, four hundred twenty-five thousand, three hundred twenty-five".