261430425425458 has 8 divisors (see below), whose sum is σ = 392525256377628. Its totient is φ = 130588673299584.

The previous prime is 261430425425359. The next prime is 261430425425459. The reversal of 261430425425458 is 854524524034162.

It can be written as a sum of positive squares in 2 ways, for example, as 234803308363849 + 26627117061609 = 15323293^2 + 5160147^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 261430425425399 and 261430425425408.

It is not an unprimeable number, because it can be changed into a prime (261430425425459) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63269703991 + ... + 63269708122.

Almost surely, 2^{261430425425458} is an apocalyptic number.

261430425425458 is a deficient number, since it is larger than the sum of its proper divisors (131094830952170).

261430425425458 is a wasteful number, since it uses less digits than its factorization.

261430425425458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126539413148.

The product of its (nonzero) digits is 36864000, while the sum is 55.

The spelling of 261430425425458 in words is "two hundred sixty-one trillion, four hundred thirty billion, four hundred twenty-five million, four hundred twenty-five thousand, four hundred fifty-eight".