85516763987 has 2 divisors, whose sum is σ = 85516763988. Its totient is φ = 85516763986.

The previous prime is 85516763881. The next prime is 85516764037. The reversal of 85516763987 is 78936761558.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85516763987 - 2¹² = 85516759891 is a prime.

It is not a weakly prime, because it can be changed into another prime (85516163987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42758381993 + 42758381994.

It is an arithmetic number, because the mean of its divisors is an integer number (42758381994).

Almost surely, 2^85516763987 is an apocalyptic number.

85516763987 is a deficient number, since it is larger than the sum of its proper divisors (1).

85516763987 is an equidigital number, since it uses as much as digits as its factorization.

85516763987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 76204800, while the sum is 65.

The spelling of 85516763987 in words is "eighty-five billion, five hundred sixteen million, seven hundred sixty-three thousand, nine hundred eighty-seven".