77969378773 has 16 divisors (see below), whose sum is σ = 91612080000. Its totient is φ = 65420498880.

The previous prime is 77969378771. The next prime is 77969378789. The reversal of 77969378773 is 37787396977.

It is not a de Polignac number, because 77969378773 - 2¹ = 77969378771 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77969378696 and 77969378705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77969378771) 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 15 ways as a sum of consecutive naturals, for example, 1256563 + ... + 1317151.

It is an arithmetic number, because the mean of its divisors is an integer number (5725755000).

Almost surely, 2^77969378773 is an apocalyptic number.

It is an amenable number.

77969378773 is a deficient number, since it is larger than the sum of its proper divisors (13642701227).

77969378773 is a wasteful number, since it uses less digits than its factorization.

77969378773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69612.

The product of its digits is 588110544, while the sum is 73.

The spelling of 77969378773 in words is "seventy-seven billion, nine hundred sixty-nine million, three hundred seventy-eight thousand, seven hundred seventy-three".