77623223819 has 2 divisors, whose sum is σ = 77623223820. Its totient is φ = 77623223818.

The previous prime is 77623223807. The next prime is 77623223857. The reversal of 77623223819 is 91832232677.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 77623223819 - 2⁴ = 77623223803 is a prime.

It is a super-2 number, since 2×77623223819² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (77623223869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38811611909 + 38811611910.

It is an arithmetic number, because the mean of its divisors is an integer number (38811611910).

Almost surely, 2^77623223819 is an apocalyptic number.

77623223819 is a deficient number, since it is larger than the sum of its proper divisors (1).

77623223819 is an equidigital number, since it uses as much as digits as its factorization.

77623223819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1524096, while the sum is 50.

The spelling of 77623223819 in words is "seventy-seven billion, six hundred twenty-three million, two hundred twenty-three thousand, eight hundred nineteen".