77769238885 has 16 divisors (see below), whose sum is σ = 101118374784. Its totient is φ = 57077255232.

The previous prime is 77769238849. The next prime is 77769238909. The reversal of 77769238885 is 58883296777.

It is a cyclic number.

It is not a de Polignac number, because 77769238885 - 2¹⁷ = 77769107813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 3659497 + ... + 3680686.

It is an arithmetic number, because the mean of its divisors is an integer number (6319898424).

Almost surely, 2^77769238885 is an apocalyptic number.

It is an amenable number.

77769238885 is a deficient number, since it is larger than the sum of its proper divisors (23349135899).

77769238885 is a wasteful number, since it uses less digits than its factorization.

77769238885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7340364.

The product of its digits is 284497920, while the sum is 70.

The spelling of 77769238885 in words is "seventy-seven billion, seven hundred sixty-nine million, two hundred thirty-eight thousand, eight hundred eighty-five".