85456778385 has 64 divisors (see below), whose sum is σ = 153086734080. Its totient is φ = 40354529280.

The previous prime is 85456778371. The next prime is 85456778437. The reversal of 85456778385 is 58387765458.

It is not a de Polignac number, because 85456778385 - 2⁹ = 85456777873 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1162401 + ... + 1233729.

It is an arithmetic number, because the mean of its divisors is an integer number (2391980220).

Almost surely, 2^85456778385 is an apocalyptic number.

It is an amenable number.

85456778385 is a deficient number, since it is larger than the sum of its proper divisors (67629955695).

85456778385 is a wasteful number, since it uses less digits than its factorization.

85456778385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71538.

The product of its digits is 225792000, while the sum is 66.

The spelling of 85456778385 in words is "eighty-five billion, four hundred fifty-six million, seven hundred seventy-eight thousand, three hundred eighty-five".