25717232340 has 288 divisors, whose sum is σ = 82423111680. Its totient is φ = 6482246400.

The previous prime is 25717232327. The next prime is 25717232369. The reversal of 25717232340 is 4323271752.

25717232340 is a `hidden beast` number, since 2 + 571 + 7 + 23 + 23 + 40 = 666.

It is a super-2 number, since 2×25717232340² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 25717232295 and 25717232304.

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, 55068787 + ... + 55069253.

It is an arithmetic number, because the mean of its divisors is an integer number (286191360).

Almost surely, 2^25717232340 is an apocalyptic number.

25717232340 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 25717232340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41211555840).

25717232340 is an abundant number, since it is smaller than the sum of its proper divisors (56705879340).

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

25717232340 is a wasteful number, since it uses less digits than its factorization.

25717232340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 723 (or 718 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 36.

The spelling of 25717232340 in words is "twenty-five billion, seven hundred seventeen million, two hundred thirty-two thousand, three hundred forty".