211268435478 has 32 divisors (see below), whose sum is σ = 426617923200. Its totient is φ = 69745116096.

The previous prime is 211268435467. The next prime is 211268435491. The reversal of 211268435478 is 874534862112.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 211268435478.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31425 + ... + 650787.

It is an arithmetic number, because the mean of its divisors is an integer number (13331810100).

Almost surely, 2^211268435478 is an apocalyptic number.

211268435478 is an abundant number, since it is smaller than the sum of its proper divisors (215349487722).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211268435478 is a wasteful number, since it uses less digits than its factorization.

211268435478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 619916.

The product of its digits is 2580480, while the sum is 51.

The spelling of 211268435478 in words is "two hundred eleven billion, two hundred sixty-eight million, four hundred thirty-five thousand, four hundred seventy-eight".