25436133325540 has 24 divisors (see below), whose sum is σ = 61046719981632. Its totient is φ = 8720959997280.

The previous prime is 25436133325501. The next prime is 25436133325553. The reversal of 25436133325540 is 4552333163452.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90843333166 + ... + 90843333445.

It is an arithmetic number, because the mean of its divisors is an integer number (2543613332568).

Almost surely, 2^{25436133325540} is an apocalyptic number.

25436133325540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25436133325540 is an abundant number, since it is smaller than the sum of its proper divisors (35610586656092).

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

25436133325540 is a wasteful number, since it uses less digits than its factorization.

25436133325540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181686666627 (or 181686666625 counting only the distinct ones).

The product of its (nonzero) digits is 3888000, while the sum is 46.

Adding to 25436133325540 its reverse (4552333163452), we get a palindrome (29988466488992).

The spelling of 25436133325540 in words is "twenty-five trillion, four hundred thirty-six billion, one hundred thirty-three million, three hundred twenty-five thousand, five hundred forty".