25853567490 has 24 divisors (see below), whose sum is σ = 67219275708. Its totient is φ = 6894284640.

The previous prime is 25853567471. The next prime is 25853567491. The reversal of 25853567490 is 9476535852.

25853567490 is a `hidden beast` number, since 2 + 5 + 8 + 535 + 67 + 49 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 25734255561 + 119311929 = 160419^2 + 10923^2 .

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

It is not an unprimeable number, because it can be changed into a prime (25853567491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 143630841 + ... + 143631020.

Almost surely, 2^25853567490 is an apocalyptic number.

25853567490 is an abundant number, since it is smaller than the sum of its proper divisors (41365708218).

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

25853567490 is a wasteful number, since it uses less digits than its factorization.

25853567490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287261874 (or 287261871 counting only the distinct ones).

The product of its (nonzero) digits is 9072000, while the sum is 54.

The spelling of 25853567490 in words is "twenty-five billion, eight hundred fifty-three million, five hundred sixty-seven thousand, four hundred ninety".