85877877829 has 2 divisors, whose sum is σ = 85877877830. Its totient is φ = 85877877828.

The previous prime is 85877877821. The next prime is 85877877887. The reversal of 85877877829 is 92877877858.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71858844225 + 14019033604 = 268065^2 + 118402^2 .

It is a cyclic number.

It is not a de Polignac number, because 85877877829 - 2³ = 85877877821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85877877821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42938938914 + 42938938915.

It is an arithmetic number, because the mean of its divisors is an integer number (42938938915).

Almost surely, 2^85877877829 is an apocalyptic number.

It is an amenable number.

85877877829 is a deficient number, since it is larger than the sum of its proper divisors (1).

85877877829 is an equidigital number, since it uses as much as digits as its factorization.

85877877829 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 885104640, while the sum is 76.

The spelling of 85877877829 in words is "eighty-five billion, eight hundred seventy-seven million, eight hundred seventy-seven thousand, eight hundred twenty-nine".