345638116353221 has 16 divisors (see below), whose sum is σ = 355583163102336. Its totient is φ = 335819952826176.

The previous prime is 345638116353217. The next prime is 345638116353223. The reversal of 345638116353221 is 122353611836543.

It is a cyclic number.

It is not a de Polignac number, because 345638116353221 - 2² = 345638116353217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345638116353223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 478300451 + ... + 479022543.

It is an arithmetic number, because the mean of its divisors is an integer number (22223947693896).

Almost surely, 2^{345638116353221} is an apocalyptic number.

It is an amenable number.

345638116353221 is a deficient number, since it is larger than the sum of its proper divisors (9945046749115).

345638116353221 is a wasteful number, since it uses less digits than its factorization.

345638116353221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 809932.

The product of its digits is 9331200, while the sum is 53.

The spelling of 345638116353221 in words is "three hundred forty-five trillion, six hundred thirty-eight billion, one hundred sixteen million, three hundred fifty-three thousand, two hundred twenty-one".