85029555557 has 2 divisors, whose sum is σ = 85029555558. Its totient is φ = 85029555556.

The previous prime is 85029555553. The next prime is 85029555581. The reversal of 85029555557 is 75555592058.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82437320161 + 2592235396 = 287119^2 + 50914^2 .

It is a cyclic number.

It is not a de Polignac number, because 85029555557 - 2² = 85029555553 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85029555551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42514777778 + 42514777779.

It is an arithmetic number, because the mean of its divisors is an integer number (42514777779).

Almost surely, 2^85029555557 is an apocalyptic number.

It is an amenable number.

85029555557 is a deficient number, since it is larger than the sum of its proper divisors (1).

85029555557 is an equidigital number, since it uses as much as digits as its factorization.

85029555557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15750000, while the sum is 56.

The spelling of 85029555557 in words is "eighty-five billion, twenty-nine million, five hundred fifty-five thousand, five hundred fifty-seven".