212856635627999 has 8 divisors (see below), whose sum is σ = 232213738056960. Its totient is φ = 193500616397400.

The previous prime is 212856635627939. The next prime is 212856635628059. The reversal of 212856635627999 is 999726536658212.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (212856635627939) and next prime (212856635628059).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 212856635627999 - 2²⁰ = 212856634579423 is a prime.

It is a super-2 number, since 2×212856635627999² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212856635627939) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 270388679 + ... + 271174760.

It is an arithmetic number, because the mean of its divisors is an integer number (29026717257120).

Almost surely, 2^{212856635627999} is an apocalyptic number.

212856635627999 is a deficient number, since it is larger than the sum of its proper divisors (19357102428961).

212856635627999 is a wasteful number, since it uses less digits than its factorization.

212856635627999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541599181.

The product of its digits is 5290790400, while the sum is 80.

The spelling of 212856635627999 in words is "two hundred twelve trillion, eight hundred fifty-six billion, six hundred thirty-five million, six hundred twenty-seven thousand, nine hundred ninety-nine".