5671991765 has 12 divisors (see below), whose sum is σ = 7481404812. Its totient is φ = 4125084480.

The previous prime is 5671991753. The next prime is 5671991771.

5671991765 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 2243537956 + 3428453809 = 47366^2 + 58553^2 .

It is not a de Polignac number, because 5671991765 - 2⁸ = 5671991509 is a prime.

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 5671991765.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4686992 + ... + 4688201.

It is an arithmetic number, because the mean of its divisors is an integer number (623450401).

Almost surely, 2^5671991765 is an apocalyptic number.

5671991765 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

5671991765 is a deficient number, since it is larger than the sum of its proper divisors (1809413047).

5671991765 is a wasteful number, since it uses less digits than its factorization.

5671991765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9375220 (or 9375209 counting only the distinct ones).

The product of its digits is 3572100, while the sum is 56.

The square root of 5671991765 is about 75312.6268629637. The cubic root of 5671991765 is about 1783.3853602508.

The spelling of 5671991765 in words is "five billion, six hundred seventy-one million, nine hundred ninety-one thousand, seven hundred sixty-five".