25718611968 has 560 divisors, whose sum is σ = 90394840800. Its totient is φ = 7283146752.

The previous prime is 25718611957. The next prime is 25718612033. The reversal of 25718611968 is 86911681752.

It is a happy number.

25718611968 is a `hidden beast` number, since 2 + 5 + 7 + 18 + 611 + 9 + 6 + 8 = 666.

It is a super-2 number, since 2×25718611968² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 227598280 + ... + 227598392.

Almost surely, 2^25718611968 is an apocalyptic number.

25718611968 is a gapful number since it is divisible by the number (28) 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 25718611968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45197420400).

25718611968 is an abundant number, since it is smaller than the sum of its proper divisors (64676228832).

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

25718611968 is an frugal number, since it uses more digits than its factorization.

25718611968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172 (or 125 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 54.

The spelling of 25718611968 in words is "twenty-five billion, seven hundred eighteen million, six hundred eleven thousand, nine hundred sixty-eight".