85777769144 has 8 divisors (see below), whose sum is σ = 160833317160. Its totient is φ = 42888884568.

The previous prime is 85777769123. The next prime is 85777769171. The reversal of 85777769144 is 44196777758.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5361110564 + ... + 5361110579.

It is an arithmetic number, because the mean of its divisors is an integer number (20104164645).

Almost surely, 2^85777769144 is an apocalyptic number.

It is an amenable number.

85777769144 is a deficient number, since it is larger than the sum of its proper divisors (75055548016).

85777769144 is a wasteful number, since it uses less digits than its factorization.

85777769144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10722221149 (or 10722221145 counting only the distinct ones).

The product of its digits is 82978560, while the sum is 65.

The spelling of 85777769144 in words is "eighty-five billion, seven hundred seventy-seven million, seven hundred sixty-nine thousand, one hundred forty-four".