345728813891 has 2 divisors, whose sum is σ = 345728813892. Its totient is φ = 345728813890.

The previous prime is 345728813869. The next prime is 345728813893. The reversal of 345728813891 is 198318827543.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 345728813891 - 2²² = 345724619587 is a prime.

Together with 345728813893, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 345728813891.

It is not a weakly prime, because it can be changed into another prime (345728813893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172864406945 + 172864406946.

It is an arithmetic number, because the mean of its divisors is an integer number (172864406946).

Almost surely, 2^345728813891 is an apocalyptic number.

345728813891 is a deficient number, since it is larger than the sum of its proper divisors (1).

345728813891 is an equidigital number, since it uses as much as digits as its factorization.

345728813891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11612160, while the sum is 59.

The spelling of 345728813891 in words is "three hundred forty-five billion, seven hundred twenty-eight million, eight hundred thirteen thousand, eight hundred ninety-one".