3765656849 has 12 divisors (see below), whose sum is σ = 3866722140. Its totient is φ = 3667171200.

The previous prime is 3765656821. The next prime is 3765656863. The reversal of 3765656849 is 9486565673.

It can be written as a sum of positive squares in 6 ways, for example, as 37699600 + 3727957249 = 6140^2 + 61057^2 .

It is not a de Polignac number, because 3765656849 - 2²⁰ = 3764608273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3765656879) 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, 1109447 + ... + 1112835.

It is an arithmetic number, because the mean of its divisors is an integer number (322226845).

Almost surely, 2^3765656849 is an apocalyptic number.

It is an amenable number.

3765656849 is a deficient number, since it is larger than the sum of its proper divisors (101065291).

3765656849 is an equidigital number, since it uses as much as digits as its factorization.

3765656849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4132 (or 4091 counting only the distinct ones).

The product of its digits is 32659200, while the sum is 59.

The square root of 3765656849 is about 61364.9480485399. The cubic root of 3765656849 is about 1555.7754494360.

The spelling of 3765656849 in words is "three billion, seven hundred sixty-five million, six hundred fifty-six thousand, eight hundred forty-nine".