83215646237 has 8 divisors (see below), whose sum is σ = 83507771256. Its totient is φ = 82923789312.

The previous prime is 83215646183. The next prime is 83215646287. The reversal of 83215646237 is 73264651238.

It can be written as a sum of positive squares in 4 ways, for example, as 5033334916 + 78182311321 = 70946^2 + 279611^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83215646237 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 83215646191 and 83215646200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83215646287) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 565283 + ... + 697119.

It is an arithmetic number, because the mean of its divisors is an integer number (10438471407).

Almost surely, 2^83215646237 is an apocalyptic number.

It is an amenable number.

83215646237 is a deficient number, since it is larger than the sum of its proper divisors (292125019).

83215646237 is a wasteful number, since it uses less digits than its factorization.

83215646237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134047.

The product of its digits is 1451520, while the sum is 47.

The spelling of 83215646237 in words is "eighty-three billion, two hundred fifteen million, six hundred forty-six thousand, two hundred thirty-seven".