29665456621489 has 6 divisors (see below), whose sum is σ = 32122950069606. Its totient is φ = 27383498419680.

The previous prime is 29665456621483. The next prime is 29665456621531. The reversal of 29665456621489 is 98412665456692.

It can be written as a sum of positive squares in 3 ways, for example, as 584027623089 + 29081428998400 = 764217^2 + 5392720^2 .

It is not a de Polignac number, because 29665456621489 - 2³ = 29665456621481 is a prime.

It is a super-2 number, since 2×29665456621489² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29665456621481) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 87767622972 + ... + 87767623309.

It is an arithmetic number, because the mean of its divisors is an integer number (5353825011601).

Almost surely, 2^{29665456621489} is an apocalyptic number.

It is an amenable number.

29665456621489 is a deficient number, since it is larger than the sum of its proper divisors (2457493448117).

29665456621489 is a wasteful number, since it uses less digits than its factorization.

29665456621489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175535246307 (or 175535246294 counting only the distinct ones).

The product of its digits is 1343692800, while the sum is 73.

The spelling of 29665456621489 in words is "twenty-nine trillion, six hundred sixty-five billion, four hundred fifty-six million, six hundred twenty-one thousand, four hundred eighty-nine".