6638181016 has 16 divisors (see below), whose sum is σ = 12493918800. Its totient is φ = 3306469344.

The previous prime is 6638181007. The next prime is 6638181061. The reversal of 6638181016 is 6101818366.

It is a self number, because there is not a number n which added to its sum of digits gives 6638181016.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1575411 + ... + 1579618.

It is an arithmetic number, because the mean of its divisors is an integer number (780869925).

Almost surely, 2^6638181016 is an apocalyptic number.

It is an amenable number.

6638181016 is a deficient number, since it is larger than the sum of its proper divisors (5855737784).

6638181016 is a wasteful number, since it uses less digits than its factorization.

6638181016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3155298 (or 3155294 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 6638181016 is about 81475.0330837613. The cubic root of 6638181016 is about 1879.3876283797.

The spelling of 6638181016 in words is "six billion, six hundred thirty-eight million, one hundred eighty-one thousand, sixteen".