25753437836 has 144 divisors (see below), whose sum is σ = 56591861760. Its totient is φ = 10187573760.

The previous prime is 25753437817. The next prime is 25753437869. The reversal of 25753437836 is 63873435752.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 59752541 + ... + 59752971.

It is an arithmetic number, because the mean of its divisors is an integer number (392999040).

Almost surely, 2^25753437836 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25753437836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28295930880).

25753437836 is an abundant number, since it is smaller than the sum of its proper divisors (30838423924).

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

25753437836 is a wasteful number, since it uses less digits than its factorization.

25753437836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 772 (or 763 counting only the distinct ones).

The product of its digits is 12700800, while the sum is 53.

The spelling of 25753437836 in words is "twenty-five billion, seven hundred fifty-three million, four hundred thirty-seven thousand, eight hundred thirty-six".