25717471752 has 128 divisors (see below), whose sum is σ = 78897162240. Its totient is φ = 6818165760.

The previous prime is 25717471751. The next prime is 25717471763.

25717471752 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×25717471752² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25717471751) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 139363 + ... + 266189.

It is an arithmetic number, because the mean of its divisors is an integer number (616384080).

Almost surely, 2^25717471752 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 25717471752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39448581120).

25717471752 is an abundant number, since it is smaller than the sum of its proper divisors (53179690488).

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

25717471752 is a wasteful number, since it uses less digits than its factorization.

25717471752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126931 (or 126927 counting only the distinct ones).

The product of its digits is 960400, while the sum is 48.

The spelling of 25717471752 in words is "twenty-five billion, seven hundred seventeen million, four hundred seventy-one thousand, seven hundred fifty-two".