4155649919 has 4 divisors (see below), whose sum is σ = 4192425696. Its totient is φ = 4118874144.

The previous prime is 4155649909. The next prime is 4155649921. The reversal of 4155649919 is 9199465514.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4155649919 is a prime.

It is a super-2 number, since 2×4155649919² = 34538852498569413122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4155649909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18387719 + ... + 18387944.

It is an arithmetic number, because the mean of its divisors is an integer number (1048106424).

Almost surely, 2^4155649919 is an apocalyptic number.

4155649919 is a deficient number, since it is larger than the sum of its proper divisors (36775777).

4155649919 is a wasteful number, since it uses less digits than its factorization.

4155649919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36775776.

The product of its digits is 1749600, while the sum is 53.

The square root of 4155649919 is about 64464.3305945234. The cubic root of 4155649919 is about 1607.7295155244.

The spelling of 4155649919 in words is "four billion, one hundred fifty-five million, six hundred forty-nine thousand, nine hundred nineteen".