25776874258 has 4 divisors (see below), whose sum is σ = 38665311390. Its totient is φ = 12888437128.

The previous prime is 25776874241. The next prime is 25776874283. The reversal of 25776874258 is 85247867752.

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., 25547866569 + 229007689 = 159837^2 + 15133^2 .

It is a junction number, because it is equal to n+sod(n) for n = 25776874196 and 25776874205.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6444218563 + ... + 6444218566.

Almost surely, 2^25776874258 is an apocalyptic number.

25776874258 is a deficient number, since it is larger than the sum of its proper divisors (12888437132).

25776874258 is a wasteful number, since it uses less digits than its factorization.

25776874258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12888437131.

The product of its digits is 52684800, while the sum is 61.

The spelling of 25776874258 in words is "twenty-five billion, seven hundred seventy-six million, eight hundred seventy-four thousand, two hundred fifty-eight".