211647872642 has 8 divisors (see below), whose sum is σ = 334180851600. Its totient is φ = 100254255444.

The previous prime is 211647872633. The next prime is 211647872647. The reversal of 211647872642 is 246278746112.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (211647872647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2784840392 + ... + 2784840467.

It is an arithmetic number, because the mean of its divisors is an integer number (41772606450).

Almost surely, 2^211647872642 is an apocalyptic number.

211647872642 is a deficient number, since it is larger than the sum of its proper divisors (122532978958).

211647872642 is a wasteful number, since it uses less digits than its factorization.

211647872642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5569680880.

The product of its digits is 1806336, while the sum is 50.

The spelling of 211647872642 in words is "two hundred eleven billion, six hundred forty-seven million, eight hundred seventy-two thousand, six hundred forty-two".