25538730700 has 72 divisors (see below), whose sum is σ = 63397157600. Its totient is φ = 8747688960.

The previous prime is 25538730691. The next prime is 25538730739. The reversal of 25538730700 is 703783552.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 731236 + ... + 765364.

Almost surely, 2^25538730700 is an apocalyptic number.

25538730700 is a gapful number since it is divisible by the number (20) 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 25538730700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31698578800).

25538730700 is an abundant number, since it is smaller than the sum of its proper divisors (37858426900).

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

25538730700 is a wasteful number, since it uses less digits than its factorization.

25538730700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35219 (or 35212 counting only the distinct ones).

The product of its (nonzero) digits is 176400, while the sum is 40.

The spelling of 25538730700 in words is "twenty-five billion, five hundred thirty-eight million, seven hundred thirty thousand, seven hundred".