201042211644 has 18 divisors (see below), whose sum is σ = 508190035080. Its totient is φ = 67014070536.

The previous prime is 201042211607. The next prime is 201042211651. The reversal of 201042211644 is 446112240102.

201042211644 is a `hidden beast` number, since 2 + 0 + 1 + 0 + 4 + 2 + 2 + 11 + 644 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2792252904 + ... + 2792252975.

Almost surely, 2^201042211644 is an apocalyptic number.

It is an amenable number.

201042211644 is an abundant number, since it is smaller than the sum of its proper divisors (307147823436).

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

201042211644 is a wasteful number, since it uses less digits than its factorization.

201042211644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5584505889 (or 5584505884 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

Adding to 201042211644 its reverse (446112240102), we get a palindrome (647154451746).

It can be divided in two parts, 201042 and 211644, that added together give a triangular number (412686 = T₉₀₈).

The spelling of 201042211644 in words is "two hundred one billion, forty-two million, two hundred eleven thousand, six hundred forty-four".