1139165856 has 60 divisors (see below), whose sum is σ = 3350262762. Its totient is φ = 379721088.

The previous prime is 1139165831. The next prime is 1139165857. The reversal of 1139165856 is 6585619311.

It can be written as a sum of positive squares in only one way, i.e., 1132995600 + 6170256 = 33660^2 + 2484^2 .

It is not an unprimeable number, because it can be changed into a prime (1139165857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 217155 + ... + 222338.

Almost surely, 2^1139165856 is an apocalyptic number.

1139165856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1139165856 is an abundant number, since it is smaller than the sum of its proper divisors (2211096906).

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

1139165856 is an equidigital number, since it uses as much as digits as its factorization.

1139165856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439515 (or 439498 counting only the distinct ones).

The product of its digits is 194400, while the sum is 45.

The square root of 1139165856 is about 33751.5311652672. The cubic root of 1139165856 is about 1044.3890741667.

The spelling of 1139165856 in words is "one billion, one hundred thirty-nine million, one hundred sixty-five thousand, eight hundred fifty-six".