23286561648 has 240 divisors, whose sum is σ = 76489104384. Its totient is φ = 6059612160.

The previous prime is 23286561601. The next prime is 23286561653. The reversal of 23286561648 is 84616568232.

It is a super-2 number, since 2×23286561648² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a self number, because there is not a number n which added to its sum of digits gives 23286561648.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1230111 + ... + 1248897.

Almost surely, 2^23286561648 is an apocalyptic number.

23286561648 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 23286561648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38244552192).

23286561648 is an abundant number, since it is smaller than the sum of its proper divisors (53202542736).

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

23286561648 is a wasteful number, since it uses less digits than its factorization.

23286561648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18860 (or 18847 counting only the distinct ones).

The product of its digits is 3317760, while the sum is 51.

The spelling of 23286561648 in words is "twenty-three billion, two hundred eighty-six million, five hundred sixty-one thousand, six hundred forty-eight".