212563634742 has 48 divisors (see below), whose sum is σ = 461372944032. Its totient is φ = 70728739200.

The previous prime is 212563634729. The next prime is 212563634747. The reversal of 212563634742 is 247436365212.

212563634742 is a `hidden beast` number, since 2 + 1 + 2 + 5 + 6 + 3 + 634 + 7 + 4 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212563634747) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 50596242 + ... + 50600442.

It is an arithmetic number, because the mean of its divisors is an integer number (9611936334).

Almost surely, 2^212563634742 is an apocalyptic number.

212563634742 is an abundant number, since it is smaller than the sum of its proper divisors (248809309290).

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

212563634742 is a wasteful number, since it uses less digits than its factorization.

212563634742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8533 (or 8530 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 45.

Adding to 212563634742 its reverse (247436365212), we get a palindrome (459999999954).

The spelling of 212563634742 in words is "two hundred twelve billion, five hundred sixty-three million, six hundred thirty-four thousand, seven hundred forty-two".