77684246623 has 2 divisors, whose sum is σ = 77684246624. Its totient is φ = 77684246622.

The previous prime is 77684246611. The next prime is 77684246687. The reversal of 77684246623 is 32664248677.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77684246623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77684246603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38842123311 + 38842123312.

It is an arithmetic number, because the mean of its divisors is an integer number (38842123312).

Almost surely, 2^77684246623 is an apocalyptic number.

77684246623 is a deficient number, since it is larger than the sum of its proper divisors (1).

77684246623 is an equidigital number, since it uses as much as digits as its factorization.

77684246623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16257024, while the sum is 55.

The spelling of 77684246623 in words is "seventy-seven billion, six hundred eighty-four million, two hundred forty-six thousand, six hundred twenty-three".