25621533512652 has 192 divisors, whose sum is σ = 79204726250496. Its totient is φ = 6240863600640.

The previous prime is 25621533512587. The next prime is 25621533512699.

It is a happy number.

25621533512652 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1406868 + ... + 7295364.

It is an arithmetic number, because the mean of its divisors is an integer number (412524615888).

Almost surely, 2^{25621533512652} is an apocalyptic number.

25621533512652 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 25621533512652, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39602363125248).

25621533512652 is an abundant number, since it is smaller than the sum of its proper divisors (53583192737844).

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

25621533512652 is a wasteful number, since it uses less digits than its factorization.

25621533512652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5888816 (or 5888814 counting only the distinct ones).

The product of its digits is 3240000, while the sum is 48.

The spelling of 25621533512652 in words is "twenty-five trillion, six hundred twenty-one billion, five hundred thirty-three million, five hundred twelve thousand, six hundred fifty-two".