25491452672 has 144 divisors (see below), whose sum is σ = 62833377600. Its totient is φ = 10281664512.

The previous prime is 25491452647. The next prime is 25491452699. The reversal of 25491452672 is 27625419452.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1484198 + ... + 1501274.

It is an arithmetic number, because the mean of its divisors is an integer number (436342900).

Almost surely, 2^25491452672 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 25491452672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31416688800).

25491452672 is an abundant number, since it is smaller than the sum of its proper divisors (37341924928).

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

25491452672 is an equidigital number, since it uses as much as digits as its factorization.

25491452672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17131 (or 17103 counting only the distinct ones).

The product of its digits is 1209600, while the sum is 47.

The spelling of 25491452672 in words is "twenty-five billion, four hundred ninety-one million, four hundred fifty-two thousand, six hundred seventy-two".