3958771641 has 24 divisors (see below), whose sum is σ = 5989009152. Its totient is φ = 2321853600.

The previous prime is 3958771639. The next prime is 3958771667. The reversal of 3958771641 is 1461778593.

It is a happy number.

It is not a de Polignac number, because 3958771641 - 2¹ = 3958771639 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3958771741) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 164646 + ... + 187151.

It is an arithmetic number, because the mean of its divisors is an integer number (249542048).

Almost surely, 2^3958771641 is an apocalyptic number.

3958771641 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

3958771641 is a deficient number, since it is larger than the sum of its proper divisors (2030237511).

3958771641 is a wasteful number, since it uses less digits than its factorization.

3958771641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351853 (or 351842 counting only the distinct ones).

The product of its digits is 1270080, while the sum is 51.

The square root of 3958771641 is about 62918.7701802888. The cubic root of 3958771641 is about 1581.9283778601.

The spelling of 3958771641 in words is "three billion, nine hundred fifty-eight million, seven hundred seventy-one thousand, six hundred forty-one".