29569897681 has 9 divisors (see below), whose sum is σ = 30073264923. Its totient is φ = 29074827720.

The previous prime is 29569897667. The next prime is 29569897691. The reversal of 29569897681 is 18679896592.

The square root of 29569897681 is 171959.

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., 961558081 + 28608339600 = 31009^2 + 169140^2 .

It is not a de Polignac number, because 29569897681 - 2²⁹ = 29033026769 is a prime.

It is a super-2 number, since 2×29569897681² (a number of 22 digits) contains 22 as substring.

Its product of digits (117573120) is a multiple of the sum of its prime divisors (2880).

It is a self number, because there is not a number n which added to its sum of digits gives 29569897681.

It is not an unprimeable number, because it can be changed into a prime (29569897691) 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, 10488090 + ... + 10490908.

Almost surely, 2^29569897681 is an apocalyptic number.

29569897681 is the 171959-th square number.

29569897681 is the 85980-th centered octagonal number.

It is an amenable number.

29569897681 is a deficient number, since it is larger than the sum of its proper divisors (503367242).

29569897681 is an frugal number, since it uses more digits than its factorization.

29569897681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5760 (or 2880 counting only the distinct ones).

The product of its digits is 117573120, while the sum is 70.

The spelling of 29569897681 in words is "twenty-nine billion, five hundred sixty-nine million, eight hundred ninety-seven thousand, six hundred eighty-one".