1171664320 has 56 divisors (see below), whose sum is σ = 2793034800. Its totient is φ = 468160512.

The previous prime is 1171664297. The next prime is 1171664323. The reversal of 1171664320 is 234661711.

It is a super-2 number, since 2×1171664320² = 2745594557522124800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1171664323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 475251 + ... + 477709.

Almost surely, 2^1171664320 is an apocalyptic number.

1171664320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1171664320 is an abundant number, since it is smaller than the sum of its proper divisors (1621370480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1171664320 is a wasteful number, since it uses less digits than its factorization.

1171664320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3965 (or 3955 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 1171664320 is about 34229.5825273987. The cubic root of 1171664320 is about 1054.2276476117.

The spelling of 1171664320 in words is "one billion, one hundred seventy-one million, six hundred sixty-four thousand, three hundred twenty".