83691685507 has 4 divisors (see below), whose sum is σ = 88096511080. Its totient is φ = 79286859936.

The previous prime is 83691685499. The next prime is 83691685537. The reversal of 83691685507 is 70558619638.

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

It is a cyclic number.

It is not a de Polignac number, because 83691685507 - 2³ = 83691685499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83691685537) 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, 2202412758 + ... + 2202412795.

It is an arithmetic number, because the mean of its divisors is an integer number (22024127770).

Almost surely, 2^83691685507 is an apocalyptic number.

83691685507 is a deficient number, since it is larger than the sum of its proper divisors (4404825573).

83691685507 is a wasteful number, since it uses less digits than its factorization.

83691685507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4404825572.

The product of its (nonzero) digits is 10886400, while the sum is 58.

The spelling of 83691685507 in words is "eighty-three billion, six hundred ninety-one million, six hundred eighty-five thousand, five hundred seven".