25501235040512 has 144 divisors (see below), whose sum is σ = 63479165697024. Its totient is φ = 9933062400000.

The previous prime is 25501235040493. The next prime is 25501235040581. The reversal of 25501235040512 is 21504053210552.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79693637 + ... + 80012987.

Almost surely, 2^{25501235040512} is an apocalyptic number.

25501235040512 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 25501235040512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31739582848512).

25501235040512 is an abundant number, since it is smaller than the sum of its proper divisors (37977930656512).

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

25501235040512 is a wasteful number, since it uses less digits than its factorization.

25501235040512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323436 (or 323422 counting only the distinct ones).

The product of its (nonzero) digits is 60000, while the sum is 35.

The spelling of 25501235040512 in words is "twenty-five trillion, five hundred one billion, two hundred thirty-five million, forty thousand, five hundred twelve".