345421840423 has 4 divisors (see below), whose sum is σ = 376823825928. Its totient is φ = 314019854920.

The previous prime is 345421840411. The next prime is 345421840441. The reversal of 345421840423 is 324048124543.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 345421840423 - 2⁵ = 345421840391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345421840223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15700992736 + ... + 15700992757.

It is an arithmetic number, because the mean of its divisors is an integer number (94205956482).

Almost surely, 2^345421840423 is an apocalyptic number.

345421840423 is a deficient number, since it is larger than the sum of its proper divisors (31401985505).

345421840423 is a wasteful number, since it uses less digits than its factorization.

345421840423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31401985504.

The product of its (nonzero) digits is 368640, while the sum is 40.

Adding to 345421840423 its reverse (324048124543), we get a palindrome (669469964966).

The spelling of 345421840423 in words is "three hundred forty-five billion, four hundred twenty-one million, eight hundred forty thousand, four hundred twenty-three".