3818685381 has 16 divisors (see below), whose sum is σ = 5976219264. Its totient is φ = 2123129664.

The previous prime is 3818685349. The next prime is 3818685383. The reversal of 3818685381 is 1835868183.

3818685381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3818685381 - 2⁵ = 3818685349 is a prime.

It is a super-2 number, since 2×3818685381² = 29164716078126230322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3818685383) 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, 2456550 + ... + 2458103.

It is an arithmetic number, because the mean of its divisors is an integer number (373513704).

Almost surely, 2^3818685381 is an apocalyptic number.

It is an amenable number.

3818685381 is a deficient number, since it is larger than the sum of its proper divisors (2157533883).

3818685381 is a wasteful number, since it uses less digits than its factorization.

3818685381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4914700.

The product of its digits is 1105920, while the sum is 51.

The square root of 3818685381 is about 61795.5126283454. The cubic root of 3818685381 is about 1563.0443210412.

The spelling of 3818685381 in words is "three billion, eight hundred eighteen million, six hundred eighty-five thousand, three hundred eighty-one".