3956281669 has 12 divisors (see below), whose sum is σ = 4178113056. Its totient is φ = 3745681128.

The previous prime is 3956281663. The next prime is 3956281687. The reversal of 3956281669 is 9661826593.

It is not a de Polignac number, because 3956281669 - 2³ = 3956281661 is a prime.

It is a super-2 number, since 2×3956281669² = 31304329288930851122, 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 (3956281661) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 872442 + ... + 876964.

It is an arithmetic number, because the mean of its divisors is an integer number (348176088).

Almost surely, 2^3956281669 is an apocalyptic number.

It is an amenable number.

3956281669 is a deficient number, since it is larger than the sum of its proper divisors (221831387).

3956281669 is a wasteful number, since it uses less digits than its factorization.

3956281669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6984 (or 6965 counting only the distinct ones).

The product of its digits is 4199040, while the sum is 55.

The square root of 3956281669 is about 62898.9798724908. The cubic root of 3956281669 is about 1581.5966433518.

The spelling of 3956281669 in words is "three billion, nine hundred fifty-six million, two hundred eighty-one thousand, six hundred sixty-nine".