25646864760 has 240 divisors, whose sum is σ = 94752365400. Its totient is φ = 6217326720.

The previous prime is 25646864723. The next prime is 25646864783. The reversal of 25646864760 is 6746864652.

25646864760 is a `hidden beast` number, since 2 + 56 + 46 + 86 + 476 + 0 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 25646864697 and 25646864706.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 359331 + ... + 424749.

Almost surely, 2^25646864760 is an apocalyptic number.

25646864760 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 25646864760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47376182700).

25646864760 is an abundant number, since it is smaller than the sum of its proper divisors (69105500640).

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

25646864760 is a wasteful number, since it uses less digits than its factorization.

25646864760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65464 (or 65440 counting only the distinct ones).

The product of its (nonzero) digits is 11612160, while the sum is 54.

The spelling of 25646864760 in words is "twenty-five billion, six hundred forty-six million, eight hundred sixty-four thousand, seven hundred sixty".