6368938181 has 8 divisors (see below), whose sum is σ = 6514625664. Its totient is φ = 6223674880.

The previous prime is 6368938141. The next prime is 6368938183. The reversal of 6368938181 is 1818398636.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6368938181 - 2¹⁸ = 6368676037 is a prime.

It is a super-2 number, since 2×6368938181² = 81126747106799177522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6368938183) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75575 + ... + 135828.

It is an arithmetic number, because the mean of its divisors is an integer number (814328208).

Almost surely, 2^6368938181 is an apocalyptic number.

It is an amenable number.

6368938181 is a deficient number, since it is larger than the sum of its proper divisors (145687483).

6368938181 is a wasteful number, since it uses less digits than its factorization.

6368938181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212091.

The product of its digits is 1492992, while the sum is 53.

The square root of 6368938181 is about 79805.6275020753. The cubic root of 6368938181 is about 1853.6269902812.

The spelling of 6368938181 in words is "six billion, three hundred sixty-eight million, nine hundred thirty-eight thousand, one hundred eighty-one".