345654712321 has 4 divisors (see below), whose sum is σ = 346213121200. Its totient is φ = 345096303444.

The previous prime is 345654712309. The next prime is 345654712331. The reversal of 345654712321 is 123217456543.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 345654712321 - 2¹¹ = 345654710273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (345654712331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 279203511 + ... + 279204748.

It is an arithmetic number, because the mean of its divisors is an integer number (86553280300).

Almost surely, 2^345654712321 is an apocalyptic number.

It is an amenable number.

345654712321 is a deficient number, since it is larger than the sum of its proper divisors (558408879).

345654712321 is an equidigital number, since it uses as much as digits as its factorization.

345654712321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 558408878.

The product of its digits is 604800, while the sum is 43.

The spelling of 345654712321 in words is "three hundred forty-five billion, six hundred fifty-four million, seven hundred twelve thousand, three hundred twenty-one".