24400640287989 has 24 divisors (see below), whose sum is σ = 41669402136960. Its totient is φ = 13462422226848.

The previous prime is 24400640287981. The next prime is 24400640288027. The reversal of 24400640287989 is 98978204600442.

24400640287989 is a `hidden beast` number, since 2 + 4 + 400 + 64 + 0 + 2 + 87 + 98 + 9 = 666.

It is not a de Polignac number, because 24400640287989 - 2³ = 24400640287981 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (24400640287981) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6677786977 + ... + 6677790630.

It is an arithmetic number, because the mean of its divisors is an integer number (1736225089040).

Almost surely, 2^{24400640287989} is an apocalyptic number.

24400640287989 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

24400640287989 is a deficient number, since it is larger than the sum of its proper divisors (17268761848971).

24400640287989 is a wasteful number, since it uses less digits than its factorization.

24400640287989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13355577649 (or 13355577646 counting only the distinct ones).

The product of its (nonzero) digits is 55738368, while the sum is 63.

The spelling of 24400640287989 in words is "twenty-four trillion, four hundred billion, six hundred forty million, two hundred eighty-seven thousand, nine hundred eighty-nine".