32644621989 has 12 divisors (see below), whose sum is σ = 53889534816. Its totient is φ = 18654069672.

The previous prime is 32644621903. The next prime is 32644622041. The reversal of 32644621989 is 98912644623.

32644621989 is a `hidden beast` number, since 3 + 2 + 6 + 4 + 4 + 621 + 9 + 8 + 9 = 666.

It is not a de Polignac number, because 32644621989 - 2⁷ = 32644621861 is a prime.

It is a super-2 number, since 2×32644621989² (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 (32648621989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 259084239 + ... + 259084364.

It is an arithmetic number, because the mean of its divisors is an integer number (4490794568).

Almost surely, 2^32644621989 is an apocalyptic number.

It is an amenable number.

32644621989 is a deficient number, since it is larger than the sum of its proper divisors (21244912827).

32644621989 is a wasteful number, since it uses less digits than its factorization.

32644621989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518168616 (or 518168613 counting only the distinct ones).

The product of its digits is 4478976, while the sum is 54.

The spelling of 32644621989 in words is "thirty-two billion, six hundred forty-four million, six hundred twenty-one thousand, nine hundred eighty-nine".