1151556661155 has 8 divisors (see below), whose sum is σ = 1842490657872. Its totient is φ = 614163552608.

The previous prime is 1151556661147. The next prime is 1151556661207. The reversal of 1151556661155 is 5511666551511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1151556661155 - 2³ = 1151556661147 is a prime.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 38385222024 + ... + 38385222053.

It is an arithmetic number, because the mean of its divisors is an integer number (230311332234).

Almost surely, 2^{1151556661155} is an apocalyptic number.

1151556661155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1151556661155 is a deficient number, since it is larger than the sum of its proper divisors (690933996717).

1151556661155 is an equidigital number, since it uses as much as digits as its factorization.

1151556661155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76770444085.

The product of its digits is 675000, while the sum is 48.

The spelling of 1151556661155 in words is "one trillion, one hundred fifty-one billion, five hundred fifty-six million, six hundred sixty-one thousand, one hundred fifty-five".