29661289761023 has 4 divisors (see below), whose sum is σ = 29877795525840. Its totient is φ = 29444783996208.

The previous prime is 29661289760987. The next prime is 29661289761083. The reversal of 29661289761023 is 32016798216692.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-29661289761023 is a prime.

It is a super-2 number, since 2×29661289761023² (a number of 28 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 (29661289761083) 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, 108252882203 + ... + 108252882476.

It is an arithmetic number, because the mean of its divisors is an integer number (7469448881460).

Almost surely, 2^{29661289761023} is an apocalyptic number.

29661289761023 is a deficient number, since it is larger than the sum of its proper divisors (216505764817).

29661289761023 is a wasteful number, since it uses less digits than its factorization.

29661289761023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216505764816.

The product of its (nonzero) digits is 23514624, while the sum is 62.

The spelling of 29661289761023 in words is "twenty-nine trillion, six hundred sixty-one billion, two hundred eighty-nine million, seven hundred sixty-one thousand, twenty-three".