345664691497 has 4 divisors (see below), whose sum is σ = 345665922516. Its totient is φ = 345663460480.

The previous prime is 345664691479. The next prime is 345664691501. The reversal of 345664691497 is 794196466543.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 794196466543 = 241 ⋅3295421023.

It can be written as a sum of positive squares in 2 ways, for example, as 228824462736 + 116840228761 = 478356^2 + 341819^2 .

It is a cyclic number.

It is not a de Polignac number, because 345664691497 - 2³⁵ = 311304953129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (345664691797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34497 + ... + 832177.

It is an arithmetic number, because the mean of its divisors is an integer number (86416480629).

Almost surely, 2^345664691497 is an apocalyptic number.

It is an amenable number.

345664691497 is a deficient number, since it is larger than the sum of its proper divisors (1231019).

345664691497 is an equidigital number, since it uses as much as digits as its factorization.

345664691497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1231018.

The product of its digits is 117573120, while the sum is 64.

The spelling of 345664691497 in words is "three hundred forty-five billion, six hundred sixty-four million, six hundred ninety-one thousand, four hundred ninety-seven".