2555861258 has 4 divisors (see below), whose sum is σ = 3833791890. Its totient is φ = 1277930628.

The previous prime is 2555861251. The next prime is 2555861279. The reversal of 2555861258 is 8521685552.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1554961489 + 1000899769 = 39433^2 + 31637^2 .

It is not an unprimeable number, because it can be changed into a prime (2555861251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 638965313 + ... + 638965316.

Almost surely, 2^2555861258 is an apocalyptic number.

2555861258 is a deficient number, since it is larger than the sum of its proper divisors (1277930632).

2555861258 is a wasteful number, since it uses less digits than its factorization.

2555861258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1277930631.

The product of its digits is 960000, while the sum is 47.

The square root of 2555861258 is about 50555.5264832639. The cubic root of 2555861258 is about 1367.2431566575.

The spelling of 2555861258 in words is "two billion, five hundred fifty-five million, eight hundred sixty-one thousand, two hundred fifty-eight".