11629629721 has 4 divisors (see below), whose sum is σ = 11803206352. Its totient is φ = 11456053092.

The previous prime is 11629629709. The next prime is 11629629727. The reversal of 11629629721 is 12792692611.

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 11629629721 - 2⁷ = 11629629593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11629629727) 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, 86788215 + ... + 86788348.

It is an arithmetic number, because the mean of its divisors is an integer number (2950801588).

Almost surely, 2^11629629721 is an apocalyptic number.

It is an amenable number.

11629629721 is a deficient number, since it is larger than the sum of its proper divisors (173576631).

11629629721 is an equidigital number, since it uses as much as digits as its factorization.

11629629721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173576630.

The product of its digits is 163296, while the sum is 46.

The spelling of 11629629721 in words is "eleven billion, six hundred twenty-nine million, six hundred twenty-nine thousand, seven hundred twenty-one".