83856664575 has 36 divisors (see below), whose sum is σ = 159031705248. Its totient is φ = 42092755200.

The previous prime is 83856664517. The next prime is 83856664583. The reversal of 83856664575 is 57546665838.

It is not a de Polignac number, because 83856664575 - 2¹⁷ = 83856533503 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 10957831 + ... + 10965480.

It is an arithmetic number, because the mean of its divisors is an integer number (4417547368).

Almost surely, 2^83856664575 is an apocalyptic number.

83856664575 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

83856664575 is a deficient number, since it is larger than the sum of its proper divisors (75175040673).

83856664575 is a wasteful number, since it uses less digits than its factorization.

83856664575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21923344 (or 21923336 counting only the distinct ones).

The product of its digits is 145152000, while the sum is 63.

The spelling of 83856664575 in words is "eighty-three billion, eight hundred fifty-six million, six hundred sixty-four thousand, five hundred seventy-five".