6345416221 has 4 divisors (see below), whose sum is σ = 6357549472. Its totient is φ = 6333282972.

The previous prime is 6345416219. The next prime is 6345416239. The reversal of 6345416221 is 1226145436.

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.

It is a cyclic number.

It is not a de Polignac number, because 6345416221 - 2¹ = 6345416219 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 (6345416201) 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, 6065841 + ... + 6066886.

It is an arithmetic number, because the mean of its divisors is an integer number (1589387368).

Almost surely, 2^6345416221 is an apocalyptic number.

It is an amenable number.

6345416221 is a deficient number, since it is larger than the sum of its proper divisors (12133251).

6345416221 is a wasteful number, since it uses less digits than its factorization.

6345416221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12133250.

The product of its digits is 34560, while the sum is 34.

The square root of 6345416221 is about 79658.1208728903. The cubic root of 6345416221 is about 1851.3422176761.

The spelling of 6345416221 in words is "six billion, three hundred forty-five million, four hundred sixteen thousand, two hundred twenty-one".