211685390158 has 32 divisors (see below), whose sum is σ = 366903351648. Its totient is φ = 90527769600.

The previous prime is 211685390153. The next prime is 211685390167. The reversal of 211685390158 is 851093586112.

It is a super-4 number, since 4×211685390158⁴ (a number of 46 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211685390153) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 944898 + ... + 1147258.

It is an arithmetic number, because the mean of its divisors is an integer number (11465729739).

Almost surely, 2^211685390158 is an apocalyptic number.

211685390158 is a deficient number, since it is larger than the sum of its proper divisors (155217961490).

211685390158 is a wasteful number, since it uses less digits than its factorization.

211685390158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205188.

The product of its (nonzero) digits is 518400, while the sum is 49.

The spelling of 211685390158 in words is "two hundred eleven billion, six hundred eighty-five million, three hundred ninety thousand, one hundred fifty-eight".