85838177897 has 2 divisors, whose sum is σ = 85838177898. Its totient is φ = 85838177896.

The previous prime is 85838177857. The next prime is 85838177951. The reversal of 85838177897 is 79877183858.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51708940816 + 34129237081 = 227396^2 + 184741^2 .

It is a cyclic number.

It is not a de Polignac number, because 85838177897 - 2⁸ = 85838177641 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 85838177897.

It is not a weakly prime, because it can be changed into another prime (85838177837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42919088948 + 42919088949.

It is an arithmetic number, because the mean of its divisors is an integer number (42919088949).

Almost surely, 2^85838177897 is an apocalyptic number.

It is an amenable number.

85838177897 is a deficient number, since it is larger than the sum of its proper divisors (1).

85838177897 is an equidigital number, since it uses as much as digits as its factorization.

85838177897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 189665280, while the sum is 71.

The spelling of 85838177897 in words is "eighty-five billion, eight hundred thirty-eight million, one hundred seventy-seven thousand, eight hundred ninety-seven".