345778665847 has 4 divisors (see below), whose sum is σ = 349202217096. Its totient is φ = 342355114600.

The previous prime is 345778665829. The next prime is 345778665853. The reversal of 345778665847 is 748566877543.

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

It is not a de Polignac number, because 345778665847 - 2⁷ = 345778665719 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 (345778663847) 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, 1711775473 + ... + 1711775674.

It is an arithmetic number, because the mean of its divisors is an integer number (87300554274).

Almost surely, 2^345778665847 is an apocalyptic number.

345778665847 is a deficient number, since it is larger than the sum of its proper divisors (3423551249).

345778665847 is a wasteful number, since it uses less digits than its factorization.

345778665847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3423551248.

The product of its digits is 948326400, while the sum is 70.

The spelling of 345778665847 in words is "three hundred forty-five billion, seven hundred seventy-eight million, six hundred sixty-five thousand, eight hundred forty-seven".