25472421136 has 20 divisors (see below), whose sum is σ = 51950333200. Its totient is φ = 12065883552.

The previous prime is 25472421113. The next prime is 25472421137. The reversal of 25472421136 is 63112427452.

It is a junction number, because it is equal to n+sod(n) for n = 25472421095 and 25472421104.

It is not an unprimeable number, because it can be changed into a prime (25472421137) 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, 41895126 + ... + 41895733.

It is an arithmetic number, because the mean of its divisors is an integer number (2597516660).

Almost surely, 2^25472421136 is an apocalyptic number.

It is an amenable number.

25472421136 is an abundant number, since it is smaller than the sum of its proper divisors (26477912064).

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

25472421136 is a wasteful number, since it uses less digits than its factorization.

25472421136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83790886 (or 83790880 counting only the distinct ones).

The product of its digits is 80640, while the sum is 37.

Adding to 25472421136 its reverse (63112427452), we get a palindrome (88584848588).

The spelling of 25472421136 in words is "twenty-five billion, four hundred seventy-two million, four hundred twenty-one thousand, one hundred thirty-six".