4006381856636 has 12 divisors (see below), whose sum is σ = 7011644880912. Its totient is φ = 2003054747808.

The previous prime is 4006381856627. The next prime is 4006381856647. The reversal of 4006381856636 is 6366581836004.

It is a hoax number, since the sum of its digits (56) coincides with the sum of the digits of its distinct prime factors.

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, 33978920 + ... + 34096623.

It is an arithmetic number, because the mean of its divisors is an integer number (584303740076).

Almost surely, 2^{4006381856636} is an apocalyptic number.

It is an amenable number.

4006381856636 is a deficient number, since it is larger than the sum of its proper divisors (3005263024276).

4006381856636 is a wasteful number, since it uses less digits than its factorization.

4006381856636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68090260 (or 68090258 counting only the distinct ones).

The product of its (nonzero) digits is 14929920, while the sum is 56.

The spelling of 4006381856636 in words is "four trillion, six billion, three hundred eighty-one million, eight hundred fifty-six thousand, six hundred thirty-six".