212620554642 has 16 divisors (see below), whose sum is σ = 428300399520. Its totient is φ = 70363636512.

The previous prime is 212620554617. The next prime is 212620554647. The reversal of 212620554642 is 246455026212.

It is a self number, because there is not a number n which added to its sum of digits gives 212620554642.

It is not an unprimeable number, because it can be changed into a prime (212620554647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127469523 + ... + 127471190.

It is an arithmetic number, because the mean of its divisors is an integer number (26768774970).

Almost surely, 2^212620554642 is an apocalyptic number.

212620554642 is an abundant number, since it is smaller than the sum of its proper divisors (215679844878).

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

212620554642 is a wasteful number, since it uses less digits than its factorization.

212620554642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254940857.

The product of its (nonzero) digits is 230400, while the sum is 39.

The spelling of 212620554642 in words is "two hundred twelve billion, six hundred twenty million, five hundred fifty-four thousand, six hundred forty-two".