85077778344 has 64 divisors (see below), whose sum is σ = 231279484800. Its totient is φ = 25923614976.

The previous prime is 85077778327. The next prime is 85077778351. The reversal of 85077778344 is 44387777058.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1291579 + ... + 1355850.

It is an arithmetic number, because the mean of its divisors is an integer number (3613741950).

Almost surely, 2^85077778344 is an apocalyptic number.

It is an amenable number.

85077778344 is an abundant number, since it is smaller than the sum of its proper divisors (146201706456).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

85077778344 is a wasteful number, since it uses less digits than its factorization.

85077778344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2647554 (or 2647550 counting only the distinct ones).

The product of its (nonzero) digits is 36879360, while the sum is 60.

The spelling of 85077778344 in words is "eighty-five billion, seventy-seven million, seven hundred seventy-eight thousand, three hundred forty-four".