25571811132 has 120 divisors (see below), whose sum is σ = 76446289920. Its totient is φ = 7301780640.

The previous prime is 25571811127. The next prime is 25571811229. The reversal of 25571811132 is 23111817552.

25571811132 is a `hidden beast` number, since 2 + 5 + 571 + 81 + 1 + 1 + 3 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 6146469 + ... + 6150627.

It is an arithmetic number, because the mean of its divisors is an integer number (637052416).

Almost surely, 2^25571811132 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 25571811132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38223144960).

25571811132 is an abundant number, since it is smaller than the sum of its proper divisors (50874478788).

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

25571811132 is a wasteful number, since it uses less digits than its factorization.

25571811132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6893 (or 6882 counting only the distinct ones).

The product of its digits is 16800, while the sum is 36.

The spelling of 25571811132 in words is "twenty-five billion, five hundred seventy-one million, eight hundred eleven thousand, one hundred thirty-two".