212324642640 has 120 divisors (see below), whose sum is σ = 777880310688. Its totient is φ = 51472638720.

The previous prime is 212324642633. The next prime is 212324642659. The reversal of 212324642640 is 46246423212.

212324642640 is a `hidden beast` number, since 2 + 1 + 2 + 3 + 2 + 4 + 6 + 4 + 2 + 640 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 212324642595 and 212324642604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13396414 + ... + 13412253.

Almost surely, 2^212324642640 is an apocalyptic number.

212324642640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212324642640 is an abundant number, since it is smaller than the sum of its proper divisors (565555668048).

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

212324642640 is a wasteful number, since it uses less digits than its factorization.

212324642640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26808697 (or 26808688 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 36.

The spelling of 212324642640 in words is "two hundred twelve billion, three hundred twenty-four million, six hundred forty-two thousand, six hundred forty".