261646136315034 has 32 divisors (see below), whose sum is σ = 563465258677440. Its totient is φ = 80693790127872.

The previous prime is 261646136314987. The next prime is 261646136315059. The reversal of 261646136315034 is 430513631646162.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21738622789 + ... + 21738634824.

It is an arithmetic number, because the mean of its divisors is an integer number (17608289333670).

Almost surely, 2^{261646136315034} is an apocalyptic number.

261646136315034 is an abundant number, since it is smaller than the sum of its proper divisors (301819122362406).

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

261646136315034 is a wasteful number, since it uses less digits than its factorization.

261646136315034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43477257694.

The product of its (nonzero) digits is 5598720, while the sum is 51.

The spelling of 261646136315034 in words is "two hundred sixty-one trillion, six hundred forty-six billion, one hundred thirty-six million, three hundred fifteen thousand, thirty-four".