3956838645 has 16 divisors (see below), whose sum is σ = 6502049280. Its totient is φ = 2053278144.

The previous prime is 3956838601. The next prime is 3956838653. The reversal of 3956838645 is 5468386593.

It is a happy number.

It is not a de Polignac number, because 3956838645 - 2⁷ = 3956838517 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3564165 + ... + 3565274.

It is an arithmetic number, because the mean of its divisors is an integer number (406378080).

Almost surely, 2^3956838645 is an apocalyptic number.

It is an amenable number.

3956838645 is a deficient number, since it is larger than the sum of its proper divisors (2545210635).

3956838645 is a wasteful number, since it uses less digits than its factorization.

3956838645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7129484.

The product of its digits is 18662400, while the sum is 57.

The square root of 3956838645 is about 62903.4072606564. The cubic root of 3956838645 is about 1581.6708603489.

The spelling of 3956838645 in words is "three billion, nine hundred fifty-six million, eight hundred thirty-eight thousand, six hundred forty-five".