25554390490 has 32 divisors (see below), whose sum is σ = 46143853200. Its totient is φ = 10189369344.

The previous prime is 25554390469. The next prime is 25554390527. The reversal of 25554390490 is 9409345552.

It can be written as a sum of positive squares in 8 ways, for example, as 23036257729 + 2518132761 = 151777^2 + 50181^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 25554390490.

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 15 ways as a sum of consecutive naturals, for example, 6522012 + ... + 6525928.

Almost surely, 2^25554390490 is an apocalyptic number.

25554390490 is a deficient number, since it is larger than the sum of its proper divisors (20589462710).

25554390490 is a wasteful number, since it uses less digits than its factorization.

25554390490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5826.

The product of its (nonzero) digits is 972000, while the sum is 46.

The spelling of 25554390490 in words is "twenty-five billion, five hundred fifty-four million, three hundred ninety thousand, four hundred ninety".