3868155636 has 12 divisors (see below), whose sum is σ = 9025696512. Its totient is φ = 1289385208.

The previous prime is 3868155587. The next prime is 3868155637. The reversal of 3868155636 is 6365518683.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-3 number, since 3×3868155636³ (a number of 30 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3868155637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 161173140 + ... + 161173163.

It is an arithmetic number, because the mean of its divisors is an integer number (752141376).

Almost surely, 2^3868155636 is an apocalyptic number.

It is an amenable number.

3868155636 is an abundant number, since it is smaller than the sum of its proper divisors (5157540876).

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

3868155636 is a wasteful number, since it uses less digits than its factorization.

3868155636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322346310 (or 322346308 counting only the distinct ones).

The product of its digits is 3110400, while the sum is 51.

The square root of 3868155636 is about 62194.4984383667. The cubic root of 3868155636 is about 1569.7650176400.

The spelling of 3868155636 in words is "three billion, eight hundred sixty-eight million, one hundred fifty-five thousand, six hundred thirty-six".