345863251381 has 2 divisors, whose sum is σ = 345863251382. Its totient is φ = 345863251380.

The previous prime is 345863251379. The next prime is 345863251417. The reversal of 345863251381 is 183152368543.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 283183622500 + 62679628881 = 532150^2 + 250359^2 .

It is a cyclic number.

It is not a de Polignac number, because 345863251381 - 2¹ = 345863251379 is a prime.

It is a super-2 number, since 2×345863251381² (a number of 24 digits) contains 22 as substring.

Together with 345863251379, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (345863251301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172931625690 + 172931625691.

It is an arithmetic number, because the mean of its divisors is an integer number (172931625691).

Almost surely, 2^345863251381 is an apocalyptic number.

It is an amenable number.

345863251381 is a deficient number, since it is larger than the sum of its proper divisors (1).

345863251381 is an equidigital number, since it uses as much as digits as its factorization.

345863251381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2073600, while the sum is 49.

The spelling of 345863251381 in words is "three hundred forty-five billion, eight hundred sixty-three million, two hundred fifty-one thousand, three hundred eighty-one".