77964236793 has 12 divisors (see below), whose sum is σ = 112626323940. Its totient is φ = 51970935456.

The previous prime is 77964236747. The next prime is 77964236797. The reversal of 77964236793 is 39763246977.

It can be written as a sum of positive squares in 2 ways, for example, as 33707858409 + 44256378384 = 183597^2 + 210372^2 .

It is not a de Polignac number, because 77964236793 - 2⁹ = 77964236281 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 77964236793.

It is not an unprimeable number, because it can be changed into a prime (77964236797) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 339546 + ... + 520787.

It is an arithmetic number, because the mean of its divisors is an integer number (9385526995).

Almost surely, 2^77964236793 is an apocalyptic number.

It is an amenable number.

77964236793 is a deficient number, since it is larger than the sum of its proper divisors (34662087147).

77964236793 is a wasteful number, since it uses less digits than its factorization.

77964236793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 870408 (or 870405 counting only the distinct ones).

The product of its digits is 72013536, while the sum is 63.

The spelling of 77964236793 in words is "seventy-seven billion, nine hundred sixty-four million, two hundred thirty-six thousand, seven hundred ninety-three".