345220007773 has 4 divisors (see below), whose sum is σ = 356356137088. Its totient is φ = 334083878460.

The previous prime is 345220007761. The next prime is 345220007893. The reversal of 345220007773 is 377700022543.

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, and also an emirpimes, since its reverse is a distinct semiprime: 377700022543 = 12491 ⋅30237773.

It is a cyclic number.

It is not a de Polignac number, because 345220007773 - 2³³ = 336630073181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345220005773) 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, 5568064611 + ... + 5568064672.

It is an arithmetic number, because the mean of its divisors is an integer number (89089034272).

Almost surely, 2^345220007773 is an apocalyptic number.

It is an amenable number.

345220007773 is a deficient number, since it is larger than the sum of its proper divisors (11136129315).

345220007773 is a wasteful number, since it uses less digits than its factorization.

345220007773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11136129314.

The product of its (nonzero) digits is 246960, while the sum is 40.

The spelling of 345220007773 in words is "three hundred forty-five billion, two hundred twenty million, seven thousand, seven hundred seventy-three".