86219733857 has 2 divisors, whose sum is σ = 86219733858. Its totient is φ = 86219733856.

The previous prime is 86219733793. The next prime is 86219733869. The reversal of 86219733857 is 75833791268.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58300999936 + 27918733921 = 241456^2 + 167089^2 .

It is a cyclic number.

It is not a de Polignac number, because 86219733857 - 2⁶ = 86219733793 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 86219733796 and 86219733805.

It is not a weakly prime, because it can be changed into another prime (86219733157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43109866928 + 43109866929.

It is an arithmetic number, because the mean of its divisors is an integer number (43109866929).

Almost surely, 2^86219733857 is an apocalyptic number.

It is an amenable number.

86219733857 is a deficient number, since it is larger than the sum of its proper divisors (1).

86219733857 is an equidigital number, since it uses as much as digits as its factorization.

86219733857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15240960, while the sum is 59.

The spelling of 86219733857 in words is "eighty-six billion, two hundred nineteen million, seven hundred thirty-three thousand, eight hundred fifty-seven".