571334921689 has 9 divisors (see below), whose sum is σ = 664620247551. Its totient is φ = 489711111960.

The previous prime is 571334921681. The next prime is 571334921711. The reversal of 571334921689 is 986129433175.

It is a happy number.

The square root of 571334921689 is 755867.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 347549158089 + 223785763600 = 589533^2 + 473060^2 .

It is not a de Polignac number, because 571334921689 - 2³ = 571334921681 is a prime.

It is a super-2 number, since 2×571334921689² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (571334921681) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 5237079 + ... + 5345059.

Almost surely, 2^571334921689 is an apocalyptic number.

571334921689 is the 755867-th square number.

571334921689 is the 377934-th centered octagonal number.

It is an amenable number.

571334921689 is a deficient number, since it is larger than the sum of its proper divisors (93285325862).

571334921689 is an frugal number, since it uses more digits than its factorization.

571334921689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215976 (or 107988 counting only the distinct ones).

The product of its digits is 9797760, while the sum is 58.

The spelling of 571334921689 in words is "five hundred seventy-one billion, three hundred thirty-four million, nine hundred twenty-one thousand, six hundred eighty-nine".