345165321623 has 4 divisors (see below), whose sum is σ = 345247137960. Its totient is φ = 345083505288.

The previous prime is 345165321593. The next prime is 345165321661. The reversal of 345165321623 is 326123561543.

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 345165321623 - 2⁶ = 345165321559 is a prime.

It is a super-2 number, since 2×345165321623² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345165321323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40901840 + ... + 40910277.

It is an arithmetic number, because the mean of its divisors is an integer number (86311784490).

Almost surely, 2^345165321623 is an apocalyptic number.

345165321623 is a deficient number, since it is larger than the sum of its proper divisors (81816337).

345165321623 is an equidigital number, since it uses as much as digits as its factorization.

345165321623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81816336.

The product of its digits is 388800, while the sum is 41.

The spelling of 345165321623 in words is "three hundred forty-five billion, one hundred sixty-five million, three hundred twenty-one thousand, six hundred twenty-three".