4491786965 has 4 divisors (see below), whose sum is σ = 5390144364. Its totient is φ = 3593429568.

The previous prime is 4491786961. The next prime is 4491786989. The reversal of 4491786965 is 5696871944.

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

It can be written as a sum of positive squares in 2 ways, for example, as 728946001 + 3762840964 = 26999^2 + 61342^2 .

It is a cyclic number.

It is not a de Polignac number, because 4491786965 - 2² = 4491786961 is a prime.

It is a super-2 number, since 2×4491786965² = 40352300277887822450, 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 (4491786961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 449178692 + ... + 449178701.

It is an arithmetic number, because the mean of its divisors is an integer number (1347536091).

Almost surely, 2^4491786965 is an apocalyptic number.

It is an amenable number.

4491786965 is a deficient number, since it is larger than the sum of its proper divisors (898357399).

4491786965 is an equidigital number, since it uses as much as digits as its factorization.

4491786965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 898357398.

The product of its digits is 13063680, while the sum is 59.

The square root of 4491786965 is about 67020.7950191580. The cubic root of 4491786965 is about 1649.9586111442.

The spelling of 4491786965 in words is "four billion, four hundred ninety-one million, seven hundred eighty-six thousand, nine hundred sixty-five".