2601331361 has 6 divisors (see below), whose sum is σ = 2673539190. Its totient is φ = 2531023776.

The previous prime is 2601331357. The next prime is 2601331373. The reversal of 2601331361 is 1631331062.

It can be written as a sum of positive squares in 3 ways, for example, as 1012830625 + 1588500736 = 31825^2 + 39856^2 .

It is not a de Polignac number, because 2601331361 - 2² = 2601331357 is a prime.

It is a super-2 number, since 2×2601331361² = 13533849699444224642, which contains 22 as substring.

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 2601331361.

It is not an unprimeable number, because it can be changed into a prime (2601331301) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 948716 + ... + 951453.

It is an arithmetic number, because the mean of its divisors is an integer number (445589865).

Almost surely, 2^2601331361 is an apocalyptic number.

It is an amenable number.

2601331361 is a deficient number, since it is larger than the sum of its proper divisors (72207829).

2601331361 is an equidigital number, since it uses as much as digits as its factorization.

2601331361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1900243 (or 1900206 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 2601331361 is about 51003.2485337944. The cubic root of 2601331361 is about 1375.3035338269.

The spelling of 2601331361 in words is "two billion, six hundred one million, three hundred thirty-one thousand, three hundred sixty-one".