612346643217 has 24 divisors (see below), whose sum is σ = 886189391360. Its totient is φ = 407452096800.

The previous prime is 612346643203. The next prime is 612346643309. The reversal of 612346643217 is 712346643216.

612346643217 is a `hidden beast` number, since 6 + 123 + 466 + 43 + 21 + 7 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-612346643217 is a prime.

It is a super-2 number, since 2×612346643217² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (612346643717) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21584592 + ... + 21612942.

Almost surely, 2^612346643217 is an apocalyptic number.

It is an amenable number.

612346643217 is a deficient number, since it is larger than the sum of its proper divisors (273842748143).

612346643217 is a wasteful number, since it uses less digits than its factorization.

612346643217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32853 (or 32850 counting only the distinct ones).

The product of its digits is 870912, while the sum is 45.

Subtracting 612346643217 from its reverse (712346643216), we obtain a palindrome (99999999999).

The spelling of 612346643217 in words is "six hundred twelve billion, three hundred forty-six million, six hundred forty-three thousand, two hundred seventeen".