25197761872 has 20 divisors (see below), whose sum is σ = 50943301920. Its totient is φ = 12051103328.

The previous prime is 25197761789. The next prime is 25197761873. The reversal of 25197761872 is 27816779152.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25197761873) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34235722 + ... + 34236457.

It is an arithmetic number, because the mean of its divisors is an integer number (2547165096).

Almost surely, 2^25197761872 is an apocalyptic number.

It is an amenable number.

25197761872 is an abundant number, since it is smaller than the sum of its proper divisors (25745540048).

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

25197761872 is a wasteful number, since it uses less digits than its factorization.

25197761872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68472210 (or 68472204 counting only the distinct ones).

The product of its digits is 2963520, while the sum is 55.

The spelling of 25197761872 in words is "twenty-five billion, one hundred ninety-seven million, seven hundred sixty-one thousand, eight hundred seventy-two".