85780216821139 has 2 divisors, whose sum is σ = 85780216821140. Its totient is φ = 85780216821138.

The previous prime is 85780216821107. The next prime is 85780216821203. The reversal of 85780216821139 is 93112861208758.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85780216821139 - 2⁵ = 85780216821107 is a prime.

It is not a weakly prime, because it can be changed into another prime (85780226821139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42890108410569 + 42890108410570.

It is an arithmetic number, because the mean of its divisors is an integer number (42890108410570).

Almost surely, 2^{85780216821139} is an apocalyptic number.

85780216821139 is a deficient number, since it is larger than the sum of its proper divisors (1).

85780216821139 is an equidigital number, since it uses as much as digits as its factorization.

85780216821139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11612160, while the sum is 61.

The spelling of 85780216821139 in words is "eighty-five trillion, seven hundred eighty billion, two hundred sixteen million, eight hundred twenty-one thousand, one hundred thirty-nine".