77385385085 has 16 divisors (see below), whose sum is σ = 94916537856. Its totient is φ = 60541099008.

The previous prime is 77385384997. The next prime is 77385385127. The reversal of 77385385085 is 58058358377.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 77385385085 - 2²⁰ = 77384336509 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 150704 + ... + 421286.

It is an arithmetic number, because the mean of its divisors is an integer number (5932283616).

Almost surely, 2^77385385085 is an apocalyptic number.

It is an amenable number.

77385385085 is a deficient number, since it is larger than the sum of its proper divisors (17531152771).

77385385085 is a wasteful number, since it uses less digits than its factorization.

77385385085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271852.

The product of its (nonzero) digits is 28224000, while the sum is 59.

The spelling of 77385385085 in words is "seventy-seven billion, three hundred eighty-five million, three hundred eighty-five thousand, eighty-five".