3851983661 has 16 divisors (see below), whose sum is σ = 4077174528. Its totient is φ = 3635049600.

The previous prime is 3851983651. The next prime is 3851983691. The reversal of 3851983661 is 1663891583.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 3851983661 - 2²² = 3847789357 is a prime.

It is a super-2 number, since 2×3851983661² = 29675556249221925842, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3851983621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 141800 + ... + 166766.

It is an arithmetic number, because the mean of its divisors is an integer number (254823408).

Almost surely, 2^3851983661 is an apocalyptic number.

It is an amenable number.

3851983661 is a deficient number, since it is larger than the sum of its proper divisors (225190867).

3851983661 is a wasteful number, since it uses less digits than its factorization.

3851983661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25132.

The product of its digits is 933120, while the sum is 50.

The square root of 3851983661 is about 62064.3509673629. The cubic root of 3851983661 is about 1567.5743387048.

The spelling of 3851983661 in words is "three billion, eight hundred fifty-one million, nine hundred eighty-three thousand, six hundred sixty-one".