25247371998 has 64 divisors (see below), whose sum is σ = 54013132800. Its totient is φ = 7848448608.

The previous prime is 25247371997. The next prime is 25247372069. The reversal of 25247371998 is 89917374252.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25247371991) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 3550915 + ... + 3558017.

It is an arithmetic number, because the mean of its divisors is an integer number (843955200).

Almost surely, 2^25247371998 is an apocalyptic number.

25247371998 is an abundant number, since it is smaller than the sum of its proper divisors (28765760802).

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

25247371998 is a wasteful number, since it uses less digits than its factorization.

25247371998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7773.

The product of its digits is 7620480, while the sum is 57.

The spelling of 25247371998 in words is "twenty-five billion, two hundred forty-seven million, three hundred seventy-one thousand, nine hundred ninety-eight".