3932649681 has 8 divisors (see below), whose sum is σ = 5246075520. Its totient is φ = 2620495152.

The previous prime is 3932649541. The next prime is 3932649683. The reversal of 3932649681 is 1869462393.

3932649681 is digitally balanced in base 3, 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 not a de Polignac number, because 3932649681 - 2⁹ = 3932649169 is a prime.

It is a super-2 number, since 2×3932649681² = 30931467026938803522, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3932649683) 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, 310585 + ... + 322998.

It is an arithmetic number, because the mean of its divisors is an integer number (655759440).

Almost surely, 2^3932649681 is an apocalyptic number.

It is an amenable number.

3932649681 is a deficient number, since it is larger than the sum of its proper divisors (1313425839).

3932649681 is a wasteful number, since it uses less digits than its factorization.

3932649681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 635655.

The product of its digits is 1679616, while the sum is 51.

The square root of 3932649681 is about 62710.8418138363. The cubic root of 3932649681 is about 1578.4412444480.

The spelling of 3932649681 in words is "three billion, nine hundred thirty-two million, six hundred forty-nine thousand, six hundred eighty-one".