2561714391 has 16 divisors (see below), whose sum is σ = 3542916960. Its totient is φ = 1644478080.

The previous prime is 2561714371. The next prime is 2561714413. The reversal of 2561714391 is 1934171652.

It is not a de Polignac number, because 2561714391 - 2²³ = 2553325783 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2561714371) 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, 7020 + ... + 71921.

It is an arithmetic number, because the mean of its divisors is an integer number (221432310).

Almost surely, 2^2561714391 is an apocalyptic number.

2561714391 is a deficient number, since it is larger than the sum of its proper divisors (981202569).

2561714391 is a wasteful number, since it uses less digits than its factorization.

2561714391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79346.

The product of its digits is 45360, while the sum is 39.

The square root of 2561714391 is about 50613.3815408534. The cubic root of 2561714391 is about 1368.2860608006.

The spelling of 2561714391 in words is "two billion, five hundred sixty-one million, seven hundred fourteen thousand, three hundred ninety-one".