3945115557 has 16 divisors (see below), whose sum is σ = 6188417280. Its totient is φ = 2475366336.

The previous prime is 3945115553. The next prime is 3945115607. The reversal of 3945115557 is 7555115493.

3945115557 is a `hidden beast` number, since 3 + 94 + 5 + 1 + 1 + 5 + 557 = 666.

It is not a de Polignac number, because 3945115557 - 2² = 3945115553 is a prime.

It is a congruent number.

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

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4297053 + ... + 4297970.

It is an arithmetic number, because the mean of its divisors is an integer number (386776080).

Almost surely, 2^3945115557 is an apocalyptic number.

It is an amenable number.

3945115557 is a deficient number, since it is larger than the sum of its proper divisors (2243301723).

3945115557 is a wasteful number, since it uses less digits than its factorization.

3945115557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8595049 (or 8595043 counting only the distinct ones).

The product of its digits is 472500, while the sum is 45.

The square root of 3945115557 is about 62810.1548875658. The cubic root of 3945115557 is about 1580.1072881533.

The spelling of 3945115557 in words is "three billion, nine hundred forty-five million, one hundred fifteen thousand, five hundred fifty-seven".