25354870198 has 16 divisors (see below), whose sum is σ = 43953870240. Its totient is φ = 10744278336.

The previous prime is 25354870159. The next prime is 25354870199. The reversal of 25354870198 is 89107845352.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25354870199) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10173261 + ... + 10175752.

It is an arithmetic number, because the mean of its divisors is an integer number (2747116890).

Almost surely, 2^25354870198 is an apocalyptic number.

25354870198 is a deficient number, since it is larger than the sum of its proper divisors (18599000042).

25354870198 is a wasteful number, since it uses less digits than its factorization.

25354870198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20349111.

The product of its (nonzero) digits is 2419200, while the sum is 52.

The spelling of 25354870198 in words is "twenty-five billion, three hundred fifty-four million, eight hundred seventy thousand, one hundred ninety-eight".