1165556320 has 48 divisors (see below), whose sum is σ = 2755973808. Its totient is φ = 465825280.

The previous prime is 1165556309. The next prime is 1165556389. The reversal of 1165556320 is 236555611.

It is a congruent number.

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, 249042 + ... + 253678.

It is an arithmetic number, because the mean of its divisors is an integer number (57416121).

Almost surely, 2^1165556320 is an apocalyptic number.

1165556320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1165556320 is an abundant number, since it is smaller than the sum of its proper divisors (1590417488).

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

1165556320 is a wasteful number, since it uses less digits than its factorization.

1165556320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6223 (or 6215 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 34.

The square root of 1165556320 is about 34140.2448731698. The cubic root of 1165556320 is about 1052.3925246127.

The spelling of 1165556320 in words is "one billion, one hundred sixty-five million, five hundred fifty-six thousand, three hundred twenty".