25463564620 has 72 divisors (see below), whose sum is σ = 57961355760. Its totient is φ = 9392497920.

The previous prime is 25463564617. The next prime is 25463564639. The reversal of 25463564620 is 2646536452.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3988591 + ... + 3994969.

It is an arithmetic number, because the mean of its divisors is an integer number (805018830).

Almost surely, 2^25463564620 is an apocalyptic number.

25463564620 is a gapful number since it is divisible by the number (20) 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 25463564620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28980677880).

25463564620 is an abundant number, since it is smaller than the sum of its proper divisors (32497791140).

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

25463564620 is a wasteful number, since it uses less digits than its factorization.

25463564620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7595 (or 7580 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 43.

The spelling of 25463564620 in words is "twenty-five billion, four hundred sixty-three million, five hundred sixty-four thousand, six hundred twenty".