25136550490 has 16 divisors (see below), whose sum is σ = 45260743752. Its totient is φ = 10051297344.

The previous prime is 25136550427. The next prime is 25136550521. The reversal of 25136550490 is 9405563152.

It can be written as a sum of positive squares in 4 ways, for example, as 25128273361 + 8277129 = 158519^2 + 2877^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 383469 + ... + 444208.

Almost surely, 2^25136550490 is an apocalyptic number.

25136550490 is a deficient number, since it is larger than the sum of its proper divisors (20124193262).

25136550490 is a wasteful number, since it uses less digits than its factorization.

25136550490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 830721.

The product of its (nonzero) digits is 162000, while the sum is 40.

The spelling of 25136550490 in words is "twenty-five billion, one hundred thirty-six million, five hundred fifty thousand, four hundred ninety".