25563164700 has 72 divisors (see below), whose sum is σ = 74073241648. Its totient is φ = 6806661120.

The previous prime is 25563164659. The next prime is 25563164701. The reversal of 25563164700 is 746136552.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25563164701) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 138594 + ... + 265206.

Almost surely, 2^25563164700 is an apocalyptic number.

25563164700 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 25563164700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37036620824).

25563164700 is an abundant number, since it is smaller than the sum of its proper divisors (48510076948).

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

25563164700 is a wasteful number, since it uses less digits than its factorization.

25563164700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127303 (or 127296 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 39.

The spelling of 25563164700 in words is "twenty-five billion, five hundred sixty-three million, one hundred sixty-four thousand, seven hundred".