24497991990 has 48 divisors (see below), whose sum is σ = 64462205808. Its totient is φ = 6454087488.

The previous prime is 24497991989. The next prime is 24497991997. The reversal of 24497991990 is 9919979442.

24497991990 is a `hidden beast` number, since 2 + 449 + 7 + 99 + 19 + 90 = 666.

It is a super-2 number, since 2×24497991990² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (24497991997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1632289 + ... + 1647228.

It is an arithmetic number, because the mean of its divisors is an integer number (1342962621).

Almost surely, 2^24497991990 is an apocalyptic number.

24497991990 is an abundant number, since it is smaller than the sum of its proper divisors (39964213818).

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

24497991990 is a wasteful number, since it uses less digits than its factorization.

24497991990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3279613 (or 3279610 counting only the distinct ones).

The product of its (nonzero) digits is 13226976, while the sum is 63.

The spelling of 24497991990 in words is "twenty-four billion, four hundred ninety-seven million, nine hundred ninety-one thousand, nine hundred ninety".