24905889856 has 21 divisors (see below), whose sum is σ = 49425130639. Its totient is φ = 12452313664.

The previous prime is 24905889791. The next prime is 24905889857. The reversal of 24905889856 is 65898850942.

The square root of 24905889856 is 157816.

It is a perfect power (a square), and thus also a powerful number.

It is a Smith number, since the sum of its digits (64) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (64).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (24905889857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1252665 + ... + 1272391.

Almost surely, 2^24905889856 is an apocalyptic number.

24905889856 is the 157816-th square number.

It is an amenable number.

24905889856 is a deficient number, since it is larger than the sum of its proper divisors (24519240783).

24905889856 is an frugal number, since it uses more digits than its factorization.

24905889856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39466 (or 19729 counting only the distinct ones).

The product of its (nonzero) digits is 49766400, while the sum is 64.

Multiplying 24905889856 by its sum of digits (64), we get a square (1593976950784 = 1262528²).

24905889856 divided by its sum of digits (64) gives a square (389154529 = 19727²).

The spelling of 24905889856 in words is "twenty-four billion, nine hundred five million, eight hundred eighty-nine thousand, eight hundred fifty-six".