77436218313 has 24 divisors (see below), whose sum is σ = 113422772736. Its totient is φ = 50903251200.

The previous prime is 77436218281. The next prime is 77436218371. The reversal of 77436218313 is 31381263477.

77436218313 is a `hidden beast` number, since 7 + 7 + 4 + 3 + 621 + 8 + 3 + 13 = 666.

It is not a de Polignac number, because 77436218313 - 2⁵ = 77436218281 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77436218393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 72928 + ... + 400238.

It is an arithmetic number, because the mean of its divisors is an integer number (4725948864).

Almost surely, 2^77436218313 is an apocalyptic number.

It is an amenable number.

77436218313 is a deficient number, since it is larger than the sum of its proper divisors (35986554423).

77436218313 is a wasteful number, since it uses less digits than its factorization.

77436218313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327685 (or 327682 counting only the distinct ones).

The product of its digits is 508032, while the sum is 45.

The spelling of 77436218313 in words is "seventy-seven billion, four hundred thirty-six million, two hundred eighteen thousand, three hundred thirteen".