25641473152 has 64 divisors (see below), whose sum is σ = 51694122240. Its totient is φ = 12667898880.

The previous prime is 25641473131. The next prime is 25641473171. The reversal of 25641473152 is 25137414652.

It is a tau number, because it is divible by the number of its divisors (64).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5763793 + ... + 5768239.

It is an arithmetic number, because the mean of its divisors is an integer number (807720660).

Almost surely, 2^25641473152 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 25641473152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25847061120).

25641473152 is an abundant number, since it is smaller than the sum of its proper divisors (26052649088).

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

25641473152 is a wasteful number, since it uses less digits than its factorization.

25641473152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4989 (or 4977 counting only the distinct ones).

The product of its digits is 201600, while the sum is 40.

The spelling of 25641473152 in words is "twenty-five billion, six hundred forty-one million, four hundred seventy-three thousand, one hundred fifty-two".