25718890850 has 24 divisors (see below), whose sum is σ = 47965421460. Its totient is φ = 10259968320.

The previous prime is 25718890831. The next prime is 25718890867. The reversal of 25718890850 is 5809881752.

It can be written as a sum of positive squares in 6 ways, for example, as 12544672009 + 13174218841 = 112003^2 + 114779^2 .

It is a super-2 number, since 2×25718890850² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25718890792 and 25718890801.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 670865 + ... + 708164.

Almost surely, 2^25718890850 is an apocalyptic number.

25718890850 is a deficient number, since it is larger than the sum of its proper divisors (22246530610).

25718890850 is a wasteful number, since it uses less digits than its factorization.

25718890850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1379414 (or 1379409 counting only the distinct ones).

The product of its (nonzero) digits is 1612800, while the sum is 53.

The spelling of 25718890850 in words is "twenty-five billion, seven hundred eighteen million, eight hundred ninety thousand, eight hundred fifty".