29008530661 has 4 divisors (see below), whose sum is σ = 31645669824. Its totient is φ = 26371391500.

The previous prime is 29008530659. The next prime is 29008530673. The reversal of 29008530661 is 16603580092.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 29008530661 - 2¹ = 29008530659 is a prime.

It is a super-2 number, since 2×29008530661² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29008530361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1318569565 + ... + 1318569586.

It is an arithmetic number, because the mean of its divisors is an integer number (7911417456).

Almost surely, 2^29008530661 is an apocalyptic number.

It is an amenable number.

29008530661 is a deficient number, since it is larger than the sum of its proper divisors (2637139163).

29008530661 is a wasteful number, since it uses less digits than its factorization.

29008530661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2637139162.

The product of its (nonzero) digits is 77760, while the sum is 40.

The spelling of 29008530661 in words is "twenty-nine billion, eight million, five hundred thirty thousand, six hundred sixty-one".