1173221664 has 48 divisors (see below), whose sum is σ = 3081939840. Its totient is φ = 390790400.

The previous prime is 1173221639. The next prime is 1173221689. The reversal of 1173221664 is 4661223711.

It is an interprime number because it is at equal distance from previous prime (1173221639) and next prime (1173221689).

It is a tau number, because it is divible by the number of its divisors (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 160489 + ... + 167639.

It is an arithmetic number, because the mean of its divisors is an integer number (64207080).

Almost surely, 2^1173221664 is an apocalyptic number.

It is an amenable number.

1173221664 is an abundant number, since it is smaller than the sum of its proper divisors (1908718176).

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

1173221664 is a wasteful number, since it uses less digits than its factorization.

1173221664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8873 (or 8865 counting only the distinct ones).

The product of its digits is 12096, while the sum is 33.

The square root of 1173221664 is about 34252.3234832325. The cubic root of 1173221664 is about 1054.6945242875.

The spelling of 1173221664 in words is "one billion, one hundred seventy-three million, two hundred twenty-one thousand, six hundred sixty-four".