23685725646 has 192 divisors, whose sum is σ = 60443615232. Its totient is φ = 6886620000.

The previous prime is 23685725633. The next prime is 23685725659. The reversal of 23685725646 is 64652758632.

23685725646 is a `hidden beast` number, since 2 + 3 + 6 + 8 + 5 + 72 + 564 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (23685725633) and next prime (23685725659).

It is a super-2 number, since 2×23685725646² (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 = 23685725592 and 23685725601.

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, 21709561 + ... + 21710651.

It is an arithmetic number, because the mean of its divisors is an integer number (314810496).

Almost surely, 2^23685725646 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23685725646, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30221807616).

23685725646 is an abundant number, since it is smaller than the sum of its proper divisors (36757889586).

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

23685725646 is a wasteful number, since it uses less digits than its factorization.

23685725646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1281 (or 1269 counting only the distinct ones).

The product of its digits is 14515200, while the sum is 54.

The spelling of 23685725646 in words is "twenty-three billion, six hundred eighty-five million, seven hundred twenty-five thousand, six hundred forty-six".