25000691892 has 192 divisors, whose sum is σ = 69239439360. Its totient is φ = 6942038400.

The previous prime is 25000691839. The next prime is 25000691897. The reversal of 25000691892 is 29819600052.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25000691897) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9692659 + ... + 9695237.

It is an arithmetic number, because the mean of its divisors is an integer number (360622080).

Almost surely, 2^25000691892 is an apocalyptic number.

25000691892 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 25000691892, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34619719680).

25000691892 is an abundant number, since it is smaller than the sum of its proper divisors (44238747468).

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

25000691892 is a wasteful number, since it uses less digits than its factorization.

25000691892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2754 (or 2752 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 42.

The spelling of 25000691892 in words is "twenty-five billion, six hundred ninety-one thousand, eight hundred ninety-two".