3881351641 has 4 divisors (see below), whose sum is σ = 3882556900. Its totient is φ = 3880146384.

The previous prime is 3881351629. The next prime is 3881351671. The reversal of 3881351641 is 1461531883.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1450467225 + 2430884416 = 38085^2 + 49304^2 .

It is a cyclic number.

It is not a de Polignac number, because 3881351641 - 2²⁷ = 3747133913 is a prime.

It is a super-2 number, since 2×3881351641² = 30129781122186785762, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3881351594 and 3881351603.

It is not an unprimeable number, because it can be changed into a prime (3881351671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 597786 + ... + 604243.

It is an arithmetic number, because the mean of its divisors is an integer number (970639225).

Almost surely, 2^3881351641 is an apocalyptic number.

It is an amenable number.

3881351641 is a deficient number, since it is larger than the sum of its proper divisors (1205259).

3881351641 is a wasteful number, since it uses less digits than its factorization.

3881351641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1205258.

The product of its digits is 69120, while the sum is 40.

The square root of 3881351641 is about 62300.4947091113. The cubic root of 3881351641 is about 1571.5480479261.

The spelling of 3881351641 in words is "three billion, eight hundred eighty-one million, three hundred fifty-one thousand, six hundred forty-one".