25117417872 has 80 divisors (see below), whose sum is σ = 72615144000. Its totient is φ = 8312219136.

The previous prime is 25117417823. The next prime is 25117417877. The reversal of 25117417872 is 27871471152.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (25117417877) 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, 149097 + ... + 269192.

It is an arithmetic number, because the mean of its divisors is an integer number (907689300).

Almost surely, 2^25117417872 is an apocalyptic number.

It is an amenable number.

25117417872 is an abundant number, since it is smaller than the sum of its proper divisors (47497726128).

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

25117417872 is a wasteful number, since it uses less digits than its factorization.

25117417872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418445 (or 418433 counting only the distinct ones).

The product of its digits is 219520, while the sum is 45.

The spelling of 25117417872 in words is "twenty-five billion, one hundred seventeen million, four hundred seventeen thousand, eight hundred seventy-two".