345680637719 has 2 divisors, whose sum is σ = 345680637720. Its totient is φ = 345680637718.

The previous prime is 345680637629. The next prime is 345680637727. The reversal of 345680637719 is 917736086543.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-345680637719 is a prime.

It is a super-2 number, since 2×345680637719² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (345680637749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172840318859 + 172840318860.

It is an arithmetic number, because the mean of its divisors is an integer number (172840318860).

Almost surely, 2^345680637719 is an apocalyptic number.

345680637719 is a deficient number, since it is larger than the sum of its proper divisors (1).

345680637719 is an equidigital number, since it uses as much as digits as its factorization.

345680637719 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22861440, while the sum is 59.

The spelling of 345680637719 in words is "three hundred forty-five billion, six hundred eighty million, six hundred thirty-seven thousand, seven hundred nineteen".