2561401233707 has 4 divisors (see below), whose sum is σ = 2571140402160. Its totient is φ = 2551662065256.

The previous prime is 2561401233697. The next prime is 2561401233739. The reversal of 2561401233707 is 7073321041652.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2561401233707 - 2⁴ = 2561401233691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2561401236707) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4869583832 + ... + 4869584357.

It is an arithmetic number, because the mean of its divisors is an integer number (642785100540).

Almost surely, 2^{2561401233707} is an apocalyptic number.

2561401233707 is a deficient number, since it is larger than the sum of its proper divisors (9739168453).

2561401233707 is an equidigital number, since it uses as much as digits as its factorization.

2561401233707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9739168452.

The product of its (nonzero) digits is 211680, while the sum is 41.

The spelling of 2561401233707 in words is "two trillion, five hundred sixty-one billion, four hundred one million, two hundred thirty-three thousand, seven hundred seven".