212377905808 has 20 divisors (see below), whose sum is σ = 411540294780. Its totient is φ = 106173958784.

The previous prime is 212377905721. The next prime is 212377905833. The reversal of 212377905808 is 808509773212.

It can be written as a sum of positive squares in 2 ways, for example, as 78281324944 + 134096580864 = 279788^2 + 366192^2 .

It is a super-7 number, since 7×212377905808⁷ (a number of 81 digits) contains 7777777 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 819835 + ... + 1047322.

It is an arithmetic number, because the mean of its divisors is an integer number (20577014739).

Almost surely, 2^212377905808 is an apocalyptic number.

It is an amenable number.

212377905808 is a deficient number, since it is larger than the sum of its proper divisors (199162388972).

212377905808 is a wasteful number, since it uses less digits than its factorization.

212377905808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1874274 (or 1874268 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 52.

The spelling of 212377905808 in words is "two hundred twelve billion, three hundred seventy-seven million, nine hundred five thousand, eight hundred eight".