25472137218 has 16 divisors (see below), whose sum is σ = 55575572256. Its totient is φ = 7718829440.

The previous prime is 25472137213. The next prime is 25472137259. The reversal of 25472137218 is 81273127452.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 25472137218.

It is not an unprimeable number, because it can be changed into a prime (25472137213) 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, 192970671 + ... + 192970802.

It is an arithmetic number, because the mean of its divisors is an integer number (3473473266).

Almost surely, 2^25472137218 is an apocalyptic number.

25472137218 is an abundant number, since it is smaller than the sum of its proper divisors (30103435038).

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

25472137218 is a wasteful number, since it uses less digits than its factorization.

25472137218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385941489.

The product of its digits is 188160, while the sum is 42.

The spelling of 25472137218 in words is "twenty-five billion, four hundred seventy-two million, one hundred thirty-seven thousand, two hundred eighteen".