4165377681 has 4 divisors (see below), whose sum is σ = 5553836912. Its totient is φ = 2776918452.

The previous prime is 4165377647. The next prime is 4165377683. The reversal of 4165377681 is 1867735614.

4165377681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 4165377681 - 2⁹ = 4165377169 is a prime.

It is a super-2 number, since 2×4165377681² = 34700742450745875522, 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 4165377681.

It is not an unprimeable number, because it can be changed into a prime (4165377683) 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, 694229611 + ... + 694229616.

It is an arithmetic number, because the mean of its divisors is an integer number (1388459228).

Almost surely, 2^4165377681 is an apocalyptic number.

It is an amenable number.

4165377681 is a deficient number, since it is larger than the sum of its proper divisors (1388459231).

4165377681 is a wasteful number, since it uses less digits than its factorization.

4165377681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1388459230.

The product of its digits is 846720, while the sum is 48.

The square root of 4165377681 is about 64539.7372244418. The cubic root of 4165377681 is about 1608.9830236318.

The spelling of 4165377681 in words is "four billion, one hundred sixty-five million, three hundred seventy-seven thousand, six hundred eighty-one".