3781805377 has 4 divisors (see below), whose sum is σ = 4322063296. Its totient is φ = 3241547460.

The previous prime is 3781805311. The next prime is 3781805411. The reversal of 3781805377 is 7735081873.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3781805377 - 2¹¹ = 3781803329 is a prime.

It is a super-2 number, since 2×3781805377² = 28604103819012224258, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3781805377.

It is not an unprimeable number, because it can be changed into a prime (3781805977) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 270128949 + ... + 270128962.

It is an arithmetic number, because the mean of its divisors is an integer number (1080515824).

Almost surely, 2^3781805377 is an apocalyptic number.

It is an amenable number.

3781805377 is a deficient number, since it is larger than the sum of its proper divisors (540257919).

3781805377 is an equidigital number, since it uses as much as digits as its factorization.

3781805377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540257918.

The product of its (nonzero) digits is 987840, while the sum is 49.

The square root of 3781805377 is about 61496.3850726203. The cubic root of 3781805377 is about 1557.9961913324.

The spelling of 3781805377 in words is "three billion, seven hundred eighty-one million, eight hundred five thousand, three hundred seventy-seven".