1171721716 has 48 divisors (see below), whose sum is σ = 2358659520. Its totient is φ = 503712000.

The previous prime is 1171721701. The next prime is 1171721737. The reversal of 1171721716 is 6171271711.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 886336 + ... + 887656.

It is an arithmetic number, because the mean of its divisors is an integer number (49138740).

Almost surely, 2^1171721716 is an apocalyptic number.

It is an amenable number.

1171721716 is an abundant number, since it is smaller than the sum of its proper divisors (1186937804).

1171721716 is a wasteful number, since it uses less digits than its factorization.

1171721716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2416 (or 2414 counting only the distinct ones).

The product of its digits is 4116, while the sum is 34.

The square root of 1171721716 is about 34230.4209147361. The cubic root of 1171721716 is about 1054.2448617179.

It can be divided in two parts, 11717 and 21716, that added together give a palindrome (33433).

The spelling of 1171721716 in words is "one billion, one hundred seventy-one million, seven hundred twenty-one thousand, seven hundred sixteen".