261052335145 has 16 divisors (see below), whose sum is σ = 362037271680. Its totient is φ = 176995995264.

The previous prime is 261052335133. The next prime is 261052335179. The reversal of 261052335145 is 541533250162.

It is a cyclic number.

It is not a de Polignac number, because 261052335145 - 2³⁷ = 123613381673 is a prime.

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, 41899347 + ... + 41905576.

It is an arithmetic number, because the mean of its divisors is an integer number (22627329480).

Almost surely, 2^261052335145 is an apocalyptic number.

It is an amenable number.

261052335145 is a deficient number, since it is larger than the sum of its proper divisors (100984936535).

261052335145 is an equidigital number, since it uses as much as digits as its factorization.

261052335145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83805024.

The product of its (nonzero) digits is 108000, while the sum is 37.

The spelling of 261052335145 in words is "two hundred sixty-one billion, fifty-two million, three hundred thirty-five thousand, one hundred forty-five".