211785371385378 has 64 divisors (see below), whose sum is σ = 497472005866752. Its totient is φ = 58845641886720.

The previous prime is 211785371385319. The next prime is 211785371385403. The reversal of 211785371385378 is 873583173587112.

211785371385378 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 195927501 + ... + 197005472.

It is an arithmetic number, because the mean of its divisors is an integer number (7773000091668).

Almost surely, 2^{211785371385378} is an apocalyptic number.

211785371385378 is an abundant number, since it is smaller than the sum of its proper divisors (285686634481374).

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

211785371385378 is a wasteful number, since it uses less digits than its factorization.

211785371385378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392933339.

The product of its digits is 237081600, while the sum is 69.

The spelling of 211785371385378 in words is "two hundred eleven trillion, seven hundred eighty-five billion, three hundred seventy-one million, three hundred eighty-five thousand, three hundred seventy-eight".