85400770777 has 8 divisors (see below), whose sum is σ = 99592736000. Its totient is φ = 73200660372.

The previous prime is 85400770759. The next prime is 85400770813. The reversal of 85400770777 is 77707700458.

It is not a de Polignac number, because 85400770777 - 2⁷ = 85400770649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85400770717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124490577 + ... + 124491262.

It is an arithmetic number, because the mean of its divisors is an integer number (12449092000).

Almost surely, 2^85400770777 is an apocalyptic number.

It is an amenable number.

85400770777 is a deficient number, since it is larger than the sum of its proper divisors (14191965223).

85400770777 is an equidigital number, since it uses as much as digits as its factorization.

85400770777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248981860 (or 248981846 counting only the distinct ones).

The product of its (nonzero) digits is 2689120, while the sum is 52.

The spelling of 85400770777 in words is "eighty-five billion, four hundred million, seven hundred seventy thousand, seven hundred seventy-seven".