29661158757421 has 8 divisors (see below), whose sum is σ = 30220890791904. Its totient is φ = 29101429964880.

The previous prime is 29661158757311. The next prime is 29661158757497. The reversal of 29661158757421 is 12475785116692.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 29661158757421 - 2⁹ = 29661158756909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29661158757221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25869510 + ... + 26991736.

It is an arithmetic number, because the mean of its divisors is an integer number (3777611348988).

Almost surely, 2^{29661158757421} is an apocalyptic number.

It is an amenable number.

29661158757421 is a deficient number, since it is larger than the sum of its proper divisors (559732034483).

29661158757421 is a wasteful number, since it uses less digits than its factorization.

29661158757421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1620971.

The product of its digits is 50803200, while the sum is 64.

The spelling of 29661158757421 in words is "twenty-nine trillion, six hundred sixty-one billion, one hundred fifty-eight million, seven hundred fifty-seven thousand, four hundred twenty-one".