24640639252 has 12 divisors (see below), whose sum is σ = 43124155200. Its totient is φ = 12319452056.

The previous prime is 24640639223. The next prime is 24640639267. The reversal of 24640639252 is 25293604642.

It is a super-2 number, since 2×24640639252² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 24640639199 and 24640639208.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 150748 + ... + 268339.

It is an arithmetic number, because the mean of its divisors is an integer number (3593679600).

Almost surely, 2^24640639252 is an apocalyptic number.

It is an amenable number.

24640639252 is a deficient number, since it is larger than the sum of its proper divisors (18483515948).

24640639252 is a wasteful number, since it uses less digits than its factorization.

24640639252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433790 (or 433788 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 43.

The spelling of 24640639252 in words is "twenty-four billion, six hundred forty million, six hundred thirty-nine thousand, two hundred fifty-two".