85746277777 has 2 divisors, whose sum is σ = 85746277778. Its totient is φ = 85746277776.

The previous prime is 85746277739. The next prime is 85746277801. The reversal of 85746277777 is 77777264758.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85731254401 + 15023376 = 292799^2 + 3876^2 .

It is a cyclic number.

It is not a de Polignac number, because 85746277777 - 2²³ = 85737889169 is a prime.

It is a super-2 number, since 2×85746277777² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (85746277717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42873138888 + 42873138889.

It is an arithmetic number, because the mean of its divisors is an integer number (42873138889).

Almost surely, 2^85746277777 is an apocalyptic number.

It is an amenable number.

85746277777 is a deficient number, since it is larger than the sum of its proper divisors (1).

85746277777 is an equidigital number, since it uses as much as digits as its factorization.

85746277777 is an evil number, because the sum of its binary digits is even.

The product of its digits is 225886080, while the sum is 67.

The spelling of 85746277777 in words is "eighty-five billion, seven hundred forty-six million, two hundred seventy-seven thousand, seven hundred seventy-seven".