6432622640 has 40 divisors (see below), whose sum is σ = 14975745360. Its totient is φ = 2569625856.

The previous prime is 6432622619. The next prime is 6432622657. The reversal of 6432622640 is 462262346.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 6432622640.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7451 + ... + 113669.

It is an arithmetic number, because the mean of its divisors is an integer number (374393634).

Almost surely, 2^6432622640 is an apocalyptic number.

It is an amenable number.

6432622640 is an abundant number, since it is smaller than the sum of its proper divisors (8543122720).

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

6432622640 is a wasteful number, since it uses less digits than its factorization.

6432622640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106989 (or 106983 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 35.

The square root of 6432622640 is about 80203.6323366966. The cubic root of 6432622640 is about 1859.7847903005.

Adding to 6432622640 its reverse (462262346), we get a palindrome (6894884986).

The spelling of 6432622640 in words is "six billion, four hundred thirty-two million, six hundred twenty-two thousand, six hundred forty".