2561156514 has 24 divisors (see below), whose sum is σ = 6341911680. Its totient is φ = 731758968.

The previous prime is 2561156483. The next prime is 2561156519. The reversal of 2561156514 is 4156511652.

2561156514 is a `hidden beast` number, since 25 + 6 + 115 + 6 + 514 = 666.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2561156519) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10163194 + ... + 10163445.

It is an arithmetic number, because the mean of its divisors is an integer number (264246320).

Almost surely, 2^2561156514 is an apocalyptic number.

2561156514 is an abundant number, since it is smaller than the sum of its proper divisors (3780755166).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2561156514 is a wasteful number, since it uses less digits than its factorization.

2561156514 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20326654 (or 20326651 counting only the distinct ones).

The product of its digits is 36000, while the sum is 36.

The square root of 2561156514 is about 50607.8700796625. The cubic root of 2561156514 is about 1368.1867274864.

The spelling of 2561156514 in words is "two billion, five hundred sixty-one million, one hundred fifty-six thousand, five hundred fourteen".