85977100771 has 2 divisors, whose sum is σ = 85977100772. Its totient is φ = 85977100770.

The previous prime is 85977100763. The next prime is 85977100793. The reversal of 85977100771 is 17700177958.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85977100771 - 2³ = 85977100763 is a prime.

It is not a weakly prime, because it can be changed into another prime (85977100271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42988550385 + 42988550386.

It is an arithmetic number, because the mean of its divisors is an integer number (42988550386).

Almost surely, 2^85977100771 is an apocalyptic number.

85977100771 is a deficient number, since it is larger than the sum of its proper divisors (1).

85977100771 is an equidigital number, since it uses as much as digits as its factorization.

85977100771 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864360, while the sum is 52.

The spelling of 85977100771 in words is "eighty-five billion, nine hundred seventy-seven million, one hundred thousand, seven hundred seventy-one".