212427873486 has 128 divisors (see below), whose sum is σ = 522788313600. Its totient is φ = 63677041920.

The previous prime is 212427873479. The next prime is 212427873487. The reversal of 212427873486 is 684378724212.

212427873486 is a `hidden beast` number, since 2 + 1 + 24 + 2 + 78 + 73 + 486 = 666.

212427873486 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212427873487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1488201 + ... + 1624683.

It is an arithmetic number, because the mean of its divisors is an integer number (4084283700).

Almost surely, 2^212427873486 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212427873486, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (261394156800).

212427873486 is an abundant number, since it is smaller than the sum of its proper divisors (310360440114).

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

212427873486 is a wasteful number, since it uses less digits than its factorization.

212427873486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136591 (or 136585 counting only the distinct ones).

The product of its digits is 7225344, while the sum is 54.

The spelling of 212427873486 in words is "two hundred twelve billion, four hundred twenty-seven million, eight hundred seventy-three thousand, four hundred eighty-six".