77345906780 has 12 divisors (see below), whose sum is σ = 162426404280. Its totient is φ = 30938362704.

The previous prime is 77345906779. The next prime is 77345906789. The reversal of 77345906780 is 8760954377.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77345906789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1933647650 + ... + 1933647689.

It is an arithmetic number, because the mean of its divisors is an integer number (13535533690).

Almost surely, 2^77345906780 is an apocalyptic number.

It is an amenable number.

77345906780 is an abundant number, since it is smaller than the sum of its proper divisors (85080497500).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77345906780 is a wasteful number, since it uses less digits than its factorization.

77345906780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3867295348 (or 3867295346 counting only the distinct ones).

The product of its (nonzero) digits is 8890560, while the sum is 56.

The spelling of 77345906780 in words is "seventy-seven billion, three hundred forty-five million, nine hundred six thousand, seven hundred eighty".