212556853393787 has 64 divisors (see below), whose sum is σ = 262941088481280. Its totient is φ = 167888721724416.

The previous prime is 212556853393727. The next prime is 212556853393793. The reversal of 212556853393787 is 787393358655212.

It is not a de Polignac number, because 212556853393787 - 2⁴⁴ = 194964667349371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212556853393727) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 668559563 + ... + 668877419.

It is an arithmetic number, because the mean of its divisors is an integer number (4108454507520).

Almost surely, 2^{212556853393787} is an apocalyptic number.

212556853393787 is a deficient number, since it is larger than the sum of its proper divisors (50384235087493).

212556853393787 is a wasteful number, since it uses less digits than its factorization.

212556853393787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319320.

The product of its digits is 2286144000, while the sum is 74.

The spelling of 212556853393787 in words is "two hundred twelve trillion, five hundred fifty-six billion, eight hundred fifty-three million, three hundred ninety-three thousand, seven hundred eighty-seven".