3956397705 has 48 divisors (see below), whose sum is σ = 7565450256. Its totient is φ = 1900247040.

The previous prime is 3956397691. The next prime is 3956397713. The reversal of 3956397705 is 5077936593.

3956397705 is a `hidden beast` number, since 3 + 9 + 563 + 9 + 7 + 70 + 5 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 1146973689 + 2809424016 = 33867^2 + 53004^2 .

It is a de Polignac number, because none of the positive numbers 2^k-3956397705 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 58492 + ... + 106461.

It is an arithmetic number, because the mean of its divisors is an integer number (157613547).

Almost surely, 2^3956397705 is an apocalyptic number.

It is an amenable number.

3956397705 is a deficient number, since it is larger than the sum of its proper divisors (3609052551).

3956397705 is a wasteful number, since it uses less digits than its factorization.

3956397705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165018 (or 165015 counting only the distinct ones).

The product of its (nonzero) digits is 5358150, while the sum is 54.

The square root of 3956397705 is about 62899.9022654249. The cubic root of 3956397705 is about 1581.6121057117.

The spelling of 3956397705 in words is "three billion, nine hundred fifty-six million, three hundred ninety-seven thousand, seven hundred five".