14771995721 has 32 divisors (see below), whose sum is σ = 18383953920. Its totient is φ = 11583129600.

The previous prime is 14771995681. The next prime is 14771995723. The reversal of 14771995721 is 12759917741.

It is not a de Polignac number, because 14771995721 - 2¹⁸ = 14771733577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (14771995723) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2020745 + ... + 2028041.

It is an arithmetic number, because the mean of its divisors is an integer number (574498560).

Almost surely, 2^14771995721 is an apocalyptic number.

It is an amenable number.

14771995721 is a deficient number, since it is larger than the sum of its proper divisors (3611958199).

14771995721 is a wasteful number, since it uses less digits than its factorization.

14771995721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7845.

The product of its digits is 1111320, while the sum is 53.

The spelling of 14771995721 in words is "fourteen billion, seven hundred seventy-one million, nine hundred ninety-five thousand, seven hundred twenty-one".