6638444152 has 64 divisors (see below), whose sum is σ = 12988916640. Its totient is φ = 3178137600.

The previous prime is 6638444117. The next prime is 6638444167. The reversal of 6638444152 is 2514448366.

It is a junction number, because it is equal to n+sod(n) for n = 6638444099 and 6638444108.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 10042702 + ... + 10043362.

Almost surely, 2^6638444152 is an apocalyptic number.

It is an amenable number.

6638444152 is a deficient number, since it is larger than the sum of its proper divisors (6350472488).

6638444152 is a wasteful number, since it uses less digits than its factorization.

6638444152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1232 (or 1228 counting only the distinct ones).

The product of its digits is 552960, while the sum is 43.

The square root of 6638444152 is about 81476.6478937370. The cubic root of 6638444152 is about 1879.4124608856.

The spelling of 6638444152 in words is "six billion, six hundred thirty-eight million, four hundred forty-four thousand, one hundred fifty-two".