2563625261 has 4 divisors (see below), whose sum is σ = 2576508000. Its totient is φ = 2550742524.

The previous prime is 2563625249. The next prime is 2563625263. The reversal of 2563625261 is 1625263652.

2563625261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2563625261 - 2²² = 2559430957 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 (2563625263) 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, 6441071 + ... + 6441468.

It is an arithmetic number, because the mean of its divisors is an integer number (644127000).

Almost surely, 2^2563625261 is an apocalyptic number.

It is an amenable number.

2563625261 is a deficient number, since it is larger than the sum of its proper divisors (12882739).

2563625261 is a wasteful number, since it uses less digits than its factorization.

2563625261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12882738.

The product of its digits is 129600, while the sum is 38.

The square root of 2563625261 is about 50632.2551443247. The cubic root of 2563625261 is about 1368.6261932984.

The spelling of 2563625261 in words is "two billion, five hundred sixty-three million, six hundred twenty-five thousand, two hundred sixty-one".