77777377763 has 4 divisors (see below), whose sum is σ = 78842821368. Its totient is φ = 76711934160.

The previous prime is 77777377759. The next prime is 77777377861. The reversal of 77777377763 is 36777377777.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 77777377763 - 2² = 77777377759 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77777377693 and 77777377702.

It is not an unprimeable number, because it can be changed into a prime (77777377723) 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 3 ways as a sum of consecutive naturals, for example, 532721693 + ... + 532721838.

It is an arithmetic number, because the mean of its divisors is an integer number (19710705342).

Almost surely, 2^77777377763 is an apocalyptic number.

77777377763 is a gapful number since it is divisible by the number (73) formed by its first and last digit.

77777377763 is a deficient number, since it is larger than the sum of its proper divisors (1065443605).

77777377763 is a wasteful number, since it uses less digits than its factorization.

77777377763 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1065443604.

The product of its digits is 311299254, while the sum is 68.

The spelling of 77777377763 in words is "seventy-seven billion, seven hundred seventy-seven million, three hundred seventy-seven thousand, seven hundred sixty-three".