83507320569 has 4 divisors (see below), whose sum is σ = 111343094096. Its totient is φ = 55671547044.

The previous prime is 83507320553. The next prime is 83507320577. The reversal of 83507320569 is 96502370538.

It is a happy number.

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 83507320569 - 2⁴ = 83507320553 is a prime.

It is a super-2 number, since 2×83507320569² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83507320529) 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, 13917886759 + ... + 13917886764.

It is an arithmetic number, because the mean of its divisors is an integer number (27835773524).

Almost surely, 2^83507320569 is an apocalyptic number.

It is an amenable number.

83507320569 is a deficient number, since it is larger than the sum of its proper divisors (27835773527).

83507320569 is a wasteful number, since it uses less digits than its factorization.

83507320569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27835773526.

The product of its (nonzero) digits is 1360800, while the sum is 48.

The spelling of 83507320569 in words is "eighty-three billion, five hundred seven million, three hundred twenty thousand, five hundred sixty-nine".