1151665656556 has 24 divisors (see below), whose sum is σ = 2124788818880. Its totient is φ = 544677406992.

The previous prime is 1151665656553. The next prime is 1151665656571. The reversal of 1151665656556 is 6556565661511.

It is a super-2 number, since 2×1151665656556² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1151665656556.

It is not an unprimeable number, because it can be changed into a prime (1151665656553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11734566 + ... + 11832301.

Almost surely, 2^{1151665656556} is an apocalyptic number.

It is an amenable number.

1151665656556 is a deficient number, since it is larger than the sum of its proper divisors (973123162324).

1151665656556 is a wasteful number, since it uses less digits than its factorization.

1151665656556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23567533 (or 23567531 counting only the distinct ones).

The product of its digits is 24300000, while the sum is 58.

The spelling of 1151665656556 in words is "one trillion, one hundred fifty-one billion, six hundred sixty-five million, six hundred fifty-six thousand, five hundred fifty-six".