85337021873 has 2 divisors, whose sum is σ = 85337021874. Its totient is φ = 85337021872.

The previous prime is 85337021863. The next prime is 85337021921. The reversal of 85337021873 is 37812073358.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74161994929 + 11175026944 = 272327^2 + 105712^2 .

It is a cyclic number.

It is not a de Polignac number, because 85337021873 - 2²⁶ = 85269913009 is a prime.

It is not a weakly prime, because it can be changed into another prime (85337021843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42668510936 + 42668510937.

It is an arithmetic number, because the mean of its divisors is an integer number (42668510937).

Almost surely, 2^85337021873 is an apocalyptic number.

It is an amenable number.

85337021873 is a deficient number, since it is larger than the sum of its proper divisors (1).

85337021873 is an equidigital number, since it uses as much as digits as its factorization.

85337021873 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 846720, while the sum is 47.

The spelling of 85337021873 in words is "eighty-five billion, three hundred thirty-seven million, twenty-one thousand, eight hundred seventy-three".