25440452312 has 48 divisors (see below), whose sum is σ = 54122913600. Its totient is φ = 11190801600.

The previous prime is 25440452311. The next prime is 25440452327. The reversal of 25440452312 is 21325404452.

It is a super-2 number, since 2×25440452312² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25440452311) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 393887 + ... + 453902.

It is an arithmetic number, because the mean of its divisors is an integer number (1127560700).

Almost surely, 2^25440452312 is an apocalyptic number.

25440452312 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

25440452312 is an abundant number, since it is smaller than the sum of its proper divisors (28682461288).

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

25440452312 is a wasteful number, since it uses less digits than its factorization.

25440452312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 847848 (or 847833 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 32.

Adding to 25440452312 its reverse (21325404452), we get a palindrome (46765856764).

The spelling of 25440452312 in words is "twenty-five billion, four hundred forty million, four hundred fifty-two thousand, three hundred twelve".