12345677819 has 2 divisors, whose sum is σ = 12345677820. Its totient is φ = 12345677818.

The previous prime is 12345677761. The next prime is 12345677833. The reversal of 12345677819 is 91877654321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12345677819 - 2³² = 8050710523 is a prime.

It is a super-2 number, since 2×12345677819² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12345677879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6172838909 + 6172838910.

It is an arithmetic number, because the mean of its divisors is an integer number (6172838910).

Almost surely, 2^12345677819 is an apocalyptic number.

12345677819 is a deficient number, since it is larger than the sum of its proper divisors (1).

12345677819 is an equidigital number, since it uses as much as digits as its factorization.

12345677819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2540160, while the sum is 53.

The spelling of 12345677819 in words is "twelve billion, three hundred forty-five million, six hundred seventy-seven thousand, eight hundred nineteen".