212836178490 has 32 divisors (see below), whose sum is σ = 550099662336. Its totient is φ = 52390443840.

The previous prime is 212836178407. The next prime is 212836178491. The reversal of 212836178490 is 94871638212.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (212836178491) 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 15 ways as a sum of consecutive naturals, for example, 272866506 + ... + 272867285.

It is an arithmetic number, because the mean of its divisors is an integer number (17190614448).

Almost surely, 2^212836178490 is an apocalyptic number.

212836178490 is an abundant number, since it is smaller than the sum of its proper divisors (337263483846).

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

212836178490 is a wasteful number, since it uses less digits than its factorization.

212836178490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545733814.

The product of its (nonzero) digits is 1161216, while the sum is 51.

The spelling of 212836178490 in words is "two hundred twelve billion, eight hundred thirty-six million, one hundred seventy-eight thousand, four hundred ninety".