25678709712 has 120 divisors (see below), whose sum is σ = 77382190080. Its totient is φ = 7919477760.

The previous prime is 25678709621. The next prime is 25678709723. The reversal of 25678709712 is 21790787652.

It is a happy number.

25678709712 is a `hidden beast` number, since 2 + 567 + 8 + 7 + 0 + 9 + 71 + 2 = 666.

It is a super-2 number, since 2×25678709712² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

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, 55537 + ... + 233327.

It is an arithmetic number, because the mean of its divisors is an integer number (644851584).

Almost surely, 2^25678709712 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 25678709712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38691095040).

25678709712 is an abundant number, since it is smaller than the sum of its proper divisors (51703480368).

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

25678709712 is a wasteful number, since it uses less digits than its factorization.

25678709712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177881 (or 177872 counting only the distinct ones).

The product of its (nonzero) digits is 2963520, while the sum is 54.

The spelling of 25678709712 in words is "twenty-five billion, six hundred seventy-eight million, seven hundred nine thousand, seven hundred twelve".