3868133781 has 8 divisors (see below), whose sum is σ = 5205713184. Its totient is φ = 2554655120.

The previous prime is 3868133771. The next prime is 3868133783. The reversal of 3868133781 is 1873318683.

3868133781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 3868133781 - 2⁵ = 3868133749 is a prime.

It is a super-2 number, since 2×3868133781² = 29924917895426711922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3868133781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3868133783) 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, 6024810 + ... + 6025451.

It is an arithmetic number, because the mean of its divisors is an integer number (650714148).

Almost surely, 2^3868133781 is an apocalyptic number.

It is an amenable number.

3868133781 is a deficient number, since it is larger than the sum of its proper divisors (1337579403).

3868133781 is a wasteful number, since it uses less digits than its factorization.

3868133781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12050371.

The product of its digits is 580608, while the sum is 48.

The square root of 3868133781 is about 62194.3227392983. The cubic root of 3868133781 is about 1569.7620612544.

The spelling of 3868133781 in words is "three billion, eight hundred sixty-eight million, one hundred thirty-three thousand, seven hundred eighty-one".