3945115556 has 12 divisors (see below), whose sum is σ = 6911995440. Its totient is φ = 1970259720.

The previous prime is 3945115553. The next prime is 3945115607. The reversal of 3945115556 is 6555115493.

It is not an unprimeable number, because it can be changed into a prime (3945115553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 570650 + ... + 577521.

It is an arithmetic number, because the mean of its divisors is an integer number (575999620).

Almost surely, 2^3945115556 is an apocalyptic number.

It is an amenable number.

3945115556 is a deficient number, since it is larger than the sum of its proper divisors (2966879884).

3945115556 is a wasteful number, since it uses less digits than its factorization.

3945115556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1149034 (or 1149032 counting only the distinct ones).

The product of its digits is 405000, while the sum is 44.

The square root of 3945115556 is about 62810.1548796053. The cubic root of 3945115556 is about 1580.1072880198.

The spelling of 3945115556 in words is "three billion, nine hundred forty-five million, one hundred fifteen thousand, five hundred fifty-six".