25540031132 has 96 divisors (see below), whose sum is σ = 57689210880. Its totient is φ = 9601560000.

The previous prime is 25540031117. The next prime is 25540031137. The reversal of 25540031132 is 23113004552.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25540031137) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3424007 + ... + 3431457.

It is an arithmetic number, because the mean of its divisors is an integer number (600929280).

Almost surely, 2^25540031132 is an apocalyptic number.

25540031132 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25540031132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28844605440).

25540031132 is an abundant number, since it is smaller than the sum of its proper divisors (32149179748).

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

25540031132 is a wasteful number, since it uses less digits than its factorization.

25540031132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7863 (or 7861 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

Adding to 25540031132 its reverse (23113004552), we get a palindrome (48653035684).

The spelling of 25540031132 in words is "twenty-five billion, five hundred forty million, thirty-one thousand, one hundred thirty-two".