3775138865 has 8 divisors (see below), whose sum is σ = 4553640168. Its totient is φ = 3004462080.

The previous prime is 3775138859. The next prime is 3775138891. The reversal of 3775138865 is 5688315773.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 602407936 + 3172730929 = 24544^2 + 56327^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3775138865 - 2⁴ = 3775138849 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1955066 + ... + 1956995.

It is an arithmetic number, because the mean of its divisors is an integer number (569205021).

Almost surely, 2^3775138865 is an apocalyptic number.

It is an amenable number.

3775138865 is a deficient number, since it is larger than the sum of its proper divisors (778501303).

3775138865 is a wasteful number, since it uses less digits than its factorization.

3775138865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3912259.

The product of its digits is 4233600, while the sum is 53.

The square root of 3775138865 is about 61442.1586941735. The cubic root of 3775138865 is about 1557.0801818033.

The spelling of 3775138865 in words is "three billion, seven hundred seventy-five million, one hundred thirty-eight thousand, eight hundred sixty-five".