25715698560 has 768 divisors, whose sum is σ = 97772875200. Its totient is φ = 6449725440.

The previous prime is 25715698559. The next prime is 25715698609. The reversal of 25715698560 is 6589651752.

25715698560 is a `hidden beast` number, since 2 + 5 + 7 + 15 + 69 + 8 + 560 = 666.

It is a super-2 number, since 2×25715698560² (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 junction number, because it is equal to n+sod(n) for n = 25715698497 and 25715698506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 235923786 + ... + 235923894.

Almost surely, 2^25715698560 is an apocalyptic number.

25715698560 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 25715698560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48886437600).

25715698560 is an abundant number, since it is smaller than the sum of its proper divisors (72057176640).

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

25715698560 is a wasteful number, since it uses less digits than its factorization.

25715698560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221 (or 197 counting only the distinct ones).

The product of its (nonzero) digits is 4536000, while the sum is 54.

The spelling of 25715698560 in words is "twenty-five billion, seven hundred fifteen million, six hundred ninety-eight thousand, five hundred sixty".