25498900800 has 126 divisors (see below), whose sum is σ = 90629165198. Its totient is φ = 6799703040.

The previous prime is 25498900759. The next prime is 25498900811. The reversal of 25498900800 is 800989452.

It can be written as a sum of positive squares in 3 ways, for example, as 19079424 + 25479821376 = 4368^2 + 159624^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

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 17 ways as a sum of consecutive naturals, for example, 870979 + ... + 899778.

Almost surely, 2^25498900800 is an apocalyptic number.

25498900800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25498900800 is an abundant number, since it is smaller than the sum of its proper divisors (65130264398).

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

25498900800 is a wasteful number, since it uses less digits than its factorization.

25498900800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1770785 (or 1770767 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The spelling of 25498900800 in words is "twenty-five billion, four hundred ninety-eight million, nine hundred thousand, eight hundred".