845156577697 has 2 divisors, whose sum is σ = 845156577698. Its totient is φ = 845156577696.

The previous prime is 845156577691. The next prime is 845156577757. The reversal of 845156577697 is 796775651548.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 631912115041 + 213244462656 = 794929^2 + 461784^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-845156577697 is a prime.

It is not a weakly prime, because it can be changed into another prime (845156577691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 422578288848 + 422578288849.

It is an arithmetic number, because the mean of its divisors is an integer number (422578288849).

Almost surely, 2^845156577697 is an apocalyptic number.

It is an amenable number.

845156577697 is a deficient number, since it is larger than the sum of its proper divisors (1).

845156577697 is an equidigital number, since it uses as much as digits as its factorization.

845156577697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 444528000, while the sum is 70.

The spelling of 845156577697 in words is "eight hundred forty-five billion, one hundred fifty-six million, five hundred seventy-seven thousand, six hundred ninety-seven".