261646730034465 has 8 divisors (see below), whose sum is σ = 418634768055168. Its totient is φ = 139544922685040.

The previous prime is 261646730034433. The next prime is 261646730034499. The reversal of 261646730034465 is 564430037646162.

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

It is not a de Polignac number, because 261646730034465 - 2⁵ = 261646730034433 is a prime.

It is a super-2 number, since 2×261646730034465² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8721557667801 + ... + 8721557667830.

It is an arithmetic number, because the mean of its divisors is an integer number (52329346006896).

Almost surely, 2^{261646730034465} is an apocalyptic number.

It is an amenable number.

261646730034465 is a deficient number, since it is larger than the sum of its proper divisors (156988038020703).

261646730034465 is a wasteful number, since it uses less digits than its factorization.

261646730034465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17443115335639.

The product of its (nonzero) digits is 52254720, while the sum is 57.

The spelling of 261646730034465 in words is "two hundred sixty-one trillion, six hundred forty-six billion, seven hundred thirty million, thirty-four thousand, four hundred sixty-five".