1155889966 has 64 divisors (see below), whose sum is σ = 2328606720. Its totient is φ = 416676960.

The previous prime is 1155889951. The next prime is 1155889967. The reversal of 1155889966 is 6699885511.

It is a super-2 number, since 2×1155889966² = 2672163226998962312, which contains 22 as substring.

It is a zygodrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 1155889966.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155889967) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 121225 + ... + 130411.

It is an arithmetic number, because the mean of its divisors is an integer number (36384480).

Almost surely, 2^1155889966 is an apocalyptic number.

1155889966 is an abundant number, since it is smaller than the sum of its proper divisors (1172716754).

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

1155889966 is a wasteful number, since it uses less digits than its factorization.

1155889966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9269.

The product of its digits is 4665600, while the sum is 58.

The square root of 1155889966 is about 33998.3818144335. The cubic root of 1155889966 is about 1049.4751620444.

The spelling of 1155889966 in words is "one billion, one hundred fifty-five million, eight hundred eighty-nine thousand, nine hundred sixty-six".