23456355840 has 800 divisors, whose sum is σ = 89836750080. Its totient is φ = 5839257600.

The previous prime is 23456355833. The next prime is 23456355877. The reversal of 23456355840 is 4855365432.

23456355840 is a `hidden beast` number, since 2 + 3 + 4 + 5 + 63 + 5 + 584 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 263554516 + ... + 263554604.

Almost surely, 2^23456355840 is an apocalyptic number.

23456355840 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 23456355840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44918375040).

23456355840 is an abundant number, since it is smaller than the sum of its proper divisors (66380394240).

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

23456355840 is an equidigital number, since it uses as much as digits as its factorization.

23456355840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196 (or 171 counting only the distinct ones).

The product of its (nonzero) digits is 1728000, while the sum is 45.

The spelling of 23456355840 in words is "twenty-three billion, four hundred fifty-six million, three hundred fifty-five thousand, eight hundred forty".