261646070160463 has 16 divisors (see below), whose sum is σ = 266609411262720. Its totient is φ = 256718424009600.

The previous prime is 261646070160451. The next prime is 261646070160479. The reversal of 261646070160463 is 364061070646162.

It is a cyclic number.

It is not a de Polignac number, because 261646070160463 - 2¹⁷ = 261646070029391 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 261646070160463.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261646070160493) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 194216556 + ... + 195559102.

It is an arithmetic number, because the mean of its divisors is an integer number (16663088203920).

Almost surely, 2^{261646070160463} is an apocalyptic number.

261646070160463 is a deficient number, since it is larger than the sum of its proper divisors (4963341102257).

261646070160463 is a wasteful number, since it uses less digits than its factorization.

261646070160463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1355838.

The product of its (nonzero) digits is 5225472, while the sum is 52.

The spelling of 261646070160463 in words is "two hundred sixty-one trillion, six hundred forty-six billion, seventy million, one hundred sixty thousand, four hundred sixty-three".