3856155782238 has 72 divisors (see below), whose sum is σ = 8490422015712. Its totient is φ = 1264878502272.

The previous prime is 3856155782233. The next prime is 3856155782273. The reversal of 3856155782238 is 8322875516583.

It is a happy number.

3856155782238 is a `hidden beast` number, since 3 + 8 + 5 + 6 + 1 + 5 + 578 + 22 + 38 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3856155782233) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 78919131 + ... + 78967977.

It is an arithmetic number, because the mean of its divisors is an integer number (117922527996).

Almost surely, 2^{3856155782238} is an apocalyptic number.

3856155782238 is an abundant number, since it is smaller than the sum of its proper divisors (4634266233474).

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

3856155782238 is a wasteful number, since it uses less digits than its factorization.

3856155782238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49966 (or 49896 counting only the distinct ones).

The product of its digits is 96768000, while the sum is 63.

The spelling of 3856155782238 in words is "three trillion, eight hundred fifty-six billion, one hundred fifty-five million, seven hundred eighty-two thousand, two hundred thirty-eight".