209152386858 has 16 divisors (see below), whose sum is σ = 418373794080. Its totient is φ = 69705958896.

The previous prime is 209152386853. The next prime is 209152386893. The reversal of 209152386858 is 858683251902.

It is a super-2 number, since 2×209152386858² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 209152386798 and 209152386807.

It is not an unprimeable number, because it can be changed into a prime (209152386853) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 2836413 + ... + 2909216.

It is an arithmetic number, because the mean of its divisors is an integer number (26148362130).

Almost surely, 2^209152386858 is an apocalyptic number.

209152386858 is an abundant number, since it is smaller than the sum of its proper divisors (209221407222).

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

209152386858 is a wasteful number, since it uses less digits than its factorization.

209152386858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5751701.

The product of its (nonzero) digits is 8294400, while the sum is 57.

The spelling of 209152386858 in words is "two hundred nine billion, one hundred fifty-two million, three hundred eighty-six thousand, eight hundred fifty-eight".