6126643640 has 64 divisors (see below), whose sum is σ = 15161247360. Its totient is φ = 2214005760.

The previous prime is 6126643639. The next prime is 6126643667. The reversal of 6126643640 is 463466216.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 6126643594 and 6126643603.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 100901 + ... + 149780.

It is an arithmetic number, because the mean of its divisors is an integer number (236894490).

Almost surely, 2^6126643640 is an apocalyptic number.

It is an amenable number.

6126643640 is an abundant number, since it is smaller than the sum of its proper divisors (9034603720).

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

6126643640 is a wasteful number, since it uses less digits than its factorization.

6126643640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250752 (or 250748 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 38.

The square root of 6126643640 is about 78272.8793388872. The cubic root of 6126643640 is about 1829.8165024486.

The spelling of 6126643640 in words is "six billion, one hundred twenty-six million, six hundred forty-three thousand, six hundred forty".