85868977819 has 2 divisors, whose sum is σ = 85868977820. Its totient is φ = 85868977818.

The previous prime is 85868977793. The next prime is 85868977841. The reversal of 85868977819 is 91877986858.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85868977819 - 2⁵ = 85868977787 is a prime.

It is a super-2 number, since 2×85868977819² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (85868977849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42934488909 + 42934488910.

It is an arithmetic number, because the mean of its divisors is an integer number (42934488910).

Almost surely, 2^85868977819 is an apocalyptic number.

85868977819 is a deficient number, since it is larger than the sum of its proper divisors (1).

85868977819 is an equidigital number, since it uses as much as digits as its factorization.

85868977819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 487710720, while the sum is 76.

The spelling of 85868977819 in words is "eighty-five billion, eight hundred sixty-eight million, nine hundred seventy-seven thousand, eight hundred nineteen".