25525552998 has 32 divisors (see below), whose sum is σ = 55713214080. Its totient is φ = 7732085760.

The previous prime is 25525552993. The next prime is 25525552999. The reversal of 25525552998 is 89925552552.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25525552993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105561 + ... + 249387.

It is an arithmetic number, because the mean of its divisors is an integer number (1741037940).

Almost surely, 2^25525552998 is an apocalyptic number.

25525552998 is an abundant number, since it is smaller than the sum of its proper divisors (30187661082).

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

25525552998 is a wasteful number, since it uses less digits than its factorization.

25525552998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146532.

The product of its digits is 16200000, while the sum is 57.

The spelling of 25525552998 in words is "twenty-five billion, five hundred twenty-five million, five hundred fifty-two thousand, nine hundred ninety-eight".