2562615561 has 32 divisors (see below), whose sum is σ = 3829472640. Its totient is φ = 1523670720.

The previous prime is 2562615553. The next prime is 2562615677. The reversal of 2562615561 is 1655162652.

It is a happy number.

It is not a de Polignac number, because 2562615561 - 2³ = 2562615553 is a prime.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (2562615061) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 205575 + ... + 217683.

It is an arithmetic number, because the mean of its divisors is an integer number (119671020).

Almost surely, 2^2562615561 is an apocalyptic number.

It is an amenable number.

2562615561 is a deficient number, since it is larger than the sum of its proper divisors (1266857079).

2562615561 is a wasteful number, since it uses less digits than its factorization.

2562615561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12198 (or 12176 counting only the distinct ones).

The product of its digits is 108000, while the sum is 39.

The square root of 2562615561 is about 50622.2832456222. The cubic root of 2562615561 is about 1368.4464890138.

The spelling of 2562615561 in words is "two billion, five hundred sixty-two million, six hundred fifteen thousand, five hundred sixty-one".