3894151681 has 8 divisors (see below), whose sum is σ = 4553958464. Its totient is φ = 3260219760.

The previous prime is 3894151673. The next prime is 3894151711. The reversal of 3894151681 is 1861514983.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3894151681 - 2³ = 3894151673 is a prime.

It is a super-2 number, since 2×3894151681² = 30328834629270251522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3894151181) 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, 6468390 + ... + 6468991.

It is an arithmetic number, because the mean of its divisors is an integer number (569244808).

Almost surely, 2^3894151681 is an apocalyptic number.

It is an amenable number.

3894151681 is a deficient number, since it is larger than the sum of its proper divisors (659806783).

3894151681 is a wasteful number, since it uses less digits than its factorization.

3894151681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12937431.

The product of its digits is 207360, while the sum is 46.

The square root of 3894151681 is about 62403.1383906290. The cubic root of 3894151681 is about 1573.2737187096.

The spelling of 3894151681 in words is "three billion, eight hundred ninety-four million, one hundred fifty-one thousand, six hundred eighty-one".