83756462509 has 4 divisors (see below), whose sum is σ = 85799303100. Its totient is φ = 81713621920.

The previous prime is 83756462497. The next prime is 83756462519. The reversal of 83756462509 is 90526465738.

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 17400248100 + 66356214409 = 131910^2 + 257597^2 .

It is a cyclic number.

It is not a de Polignac number, because 83756462509 - 2⁷ = 83756462381 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 83756462509.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83756462519) 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, 1021420234 + ... + 1021420315.

It is an arithmetic number, because the mean of its divisors is an integer number (21449825775).

Almost surely, 2^83756462509 is an apocalyptic number.

It is an amenable number.

83756462509 is a deficient number, since it is larger than the sum of its proper divisors (2042840591).

83756462509 is a wasteful number, since it uses less digits than its factorization.

83756462509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2042840590.

The product of its (nonzero) digits is 10886400, while the sum is 55.

The spelling of 83756462509 in words is "eighty-three billion, seven hundred fifty-six million, four hundred sixty-two thousand, five hundred nine".