23981620455 has 64 divisors (see below), whose sum is σ = 46264458240. Its totient is φ = 11716099200.

The previous prime is 23981620423. The next prime is 23981620463. The reversal of 23981620455 is 55402618932.

23981620455 is a `hidden beast` number, since 2 + 39 + 8 + 162 + 0 + 455 = 666.

It is not a de Polignac number, because 23981620455 - 2⁵ = 23981620423 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 23981620455.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 177750 + ... + 282060.

It is an arithmetic number, because the mean of its divisors is an integer number (722882160).

Almost surely, 2^23981620455 is an apocalyptic number.

23981620455 is a deficient number, since it is larger than the sum of its proper divisors (22282837785).

23981620455 is a wasteful number, since it uses less digits than its factorization.

23981620455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104469 (or 104463 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 45.

The spelling of 23981620455 in words is "twenty-three billion, nine hundred eighty-one million, six hundred twenty thousand, four hundred fifty-five".