25499641632 has 96 divisors (see below), whose sum is σ = 68106515904. Its totient is φ = 8351616000.

The previous prime is 25499641613. The next prime is 25499641667. The reversal of 25499641632 is 23614699452.

It is a tau number, because it is divible by the number of its divisors (96).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7616983 + ... + 7620329.

It is an arithmetic number, because the mean of its divisors is an integer number (709442874).

Almost surely, 2^25499641632 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 25499641632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34053257952).

25499641632 is an abundant number, since it is smaller than the sum of its proper divisors (42606874272).

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

25499641632 is a wasteful number, since it uses less digits than its factorization.

25499641632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4722 (or 4714 counting only the distinct ones).

The product of its digits is 2799360, while the sum is 51.

The spelling of 25499641632 in words is "twenty-five billion, four hundred ninety-nine million, six hundred forty-one thousand, six hundred thirty-two".