25478990235 has 40 divisors (see below), whose sum is σ = 45685205280. Its totient is φ = 13585297536.

The previous prime is 25478990219. The next prime is 25478990249. The reversal of 25478990235 is 53209987452.

25478990235 is a `hidden beast` number, since 2 + 547 + 8 + 9 + 90 + 2 + 3 + 5 = 666.

It is not a de Polignac number, because 25478990235 - 2⁴ = 25478990219 is a prime.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2616706 + ... + 2626424.

It is an arithmetic number, because the mean of its divisors is an integer number (1142130132).

Almost surely, 2^25478990235 is an apocalyptic number.

25478990235 is a deficient number, since it is larger than the sum of its proper divisors (20206215045).

25478990235 is an equidigital number, since it uses as much as digits as its factorization.

25478990235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16209 (or 16200 counting only the distinct ones).

The product of its (nonzero) digits is 5443200, while the sum is 54.

The spelling of 25478990235 in words is "twenty-five billion, four hundred seventy-eight million, nine hundred ninety thousand, two hundred thirty-five".