2558520261 has 12 divisors (see below), whose sum is σ = 4031607840. Its totient is φ = 1550618280.

The previous prime is 2558520257. The next prime is 2558520323. The reversal of 2558520261 is 1620258552.

It is a happy number.

2558520261 is a `hidden beast` number, since 25 + 58 + 520 + 2 + 61 = 666.

It is not a de Polignac number, because 2558520261 - 2² = 2558520257 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2558520061) 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, 12921721 + ... + 12921918.

It is an arithmetic number, because the mean of its divisors is an integer number (335967320).

Almost surely, 2^2558520261 is an apocalyptic number.

It is an amenable number.

2558520261 is a deficient number, since it is larger than the sum of its proper divisors (1473087579).

2558520261 is a wasteful number, since it uses less digits than its factorization.

2558520261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25843656 (or 25843653 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 36.

The square root of 2558520261 is about 50581.8174940363. The cubic root of 2558520261 is about 1367.7171317391.

The spelling of 2558520261 in words is "two billion, five hundred fifty-eight million, five hundred twenty thousand, two hundred sixty-one".