572001211661 has 12 divisors (see below), whose sum is σ = 628816658400. Its totient is φ = 519928275240.

The previous prime is 572001211601. The next prime is 572001211667. The reversal of 572001211661 is 166112100275.

It is not a de Polignac number, because 572001211661 - 2¹⁰ = 572001210637 is a prime.

It is a super-2 number, since 2×572001211661² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (572001211667) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 546080 + ... + 1200918.

It is an arithmetic number, because the mean of its divisors is an integer number (52401388200).

Almost surely, 2^572001211661 is an apocalyptic number.

It is an amenable number.

572001211661 is a deficient number, since it is larger than the sum of its proper divisors (56815446739).

572001211661 is a wasteful number, since it uses less digits than its factorization.

572001211661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 662080 (or 662069 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 32.

The spelling of 572001211661 in words is "five hundred seventy-two billion, one million, two hundred eleven thousand, six hundred sixty-one".