11720478729 has 32 divisors (see below), whose sum is σ = 16238460928. Its totient is φ = 7511616000.

The previous prime is 11720478703. The next prime is 11720478769. The reversal of 11720478729 is 92787402711.

It is not a de Polignac number, because 11720478729 - 2³² = 7425511433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11720478769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16961274 + ... + 16961964.

It is an arithmetic number, because the mean of its divisors is an integer number (507451904).

Almost surely, 2^11720478729 is an apocalyptic number.

It is an amenable number.

11720478729 is a deficient number, since it is larger than the sum of its proper divisors (4517982199).

11720478729 is a wasteful number, since it uses less digits than its factorization.

11720478729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1669.

The product of its (nonzero) digits is 395136, while the sum is 48.

The spelling of 11720478729 in words is "eleven billion, seven hundred twenty million, four hundred seventy-eight thousand, seven hundred twenty-nine".