2561304607 has 4 divisors (see below), whose sum is σ = 2561473296. Its totient is φ = 2561135920.

The previous prime is 2561304593. The next prime is 2561304611. The reversal of 2561304607 is 7064031652.

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 2561304607 - 2⁷ = 2561304479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2561304667) 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, 59038 + ... + 92779.

It is an arithmetic number, because the mean of its divisors is an integer number (640368324).

Almost surely, 2^2561304607 is an apocalyptic number.

2561304607 is a deficient number, since it is larger than the sum of its proper divisors (168689).

2561304607 is a wasteful number, since it uses less digits than its factorization.

2561304607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168688.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 2561304607 is about 50609.3332005076. Note that the first 3 decimals coincide. The cubic root of 2561304607 is about 1368.2130977311.

The spelling of 2561304607 in words is "two billion, five hundred sixty-one million, three hundred four thousand, six hundred seven".