25478990236 has 24 divisors (see below), whose sum is σ = 51425491040. Its totient is φ = 10819386432.

The previous prime is 25478990219. The next prime is 25478990249. The reversal of 25478990236 is 63209987452.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4171095 + ... + 4177198.

Almost surely, 2^25478990236 is an apocalyptic number.

It is an amenable number.

25478990236 is an abundant number, since it is smaller than the sum of its proper divisors (25946500804).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25478990236 is a wasteful number, since it uses less digits than its factorization.

25478990236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8348413 (or 8348411 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 55.

The spelling of 25478990236 in words is "twenty-five billion, four hundred seventy-eight million, nine hundred ninety thousand, two hundred thirty-six".