3867817826181 has 16 divisors (see below), whose sum is σ = 5410060882560. Its totient is φ = 2454564651840.

The previous prime is 3867817826179. The next prime is 3867817826219. The reversal of 3867817826181 is 1816287187683.

It is not a de Polignac number, because 3867817826181 - 2¹ = 3867817826179 is a prime.

It is a super-2 number, since 2×3867817826181² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3867817826141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 313076050 + ... + 313088403.

It is an arithmetic number, because the mean of its divisors is an integer number (338128805160).

Almost surely, 2^{3867817826181} is an apocalyptic number.

It is an amenable number.

3867817826181 is a deficient number, since it is larger than the sum of its proper divisors (1542243056379).

3867817826181 is a wasteful number, since it uses less digits than its factorization.

3867817826181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 626164556.

The product of its digits is 43352064, while the sum is 66.

The spelling of 3867817826181 in words is "three trillion, eight hundred sixty-seven billion, eight hundred seventeen million, eight hundred twenty-six thousand, one hundred eighty-one".