1155722805880 has 16 divisors (see below), whose sum is σ = 2600376313320. Its totient is φ = 462289122336.

The previous prime is 1155722805869. The next prime is 1155722805917. The reversal of 1155722805880 is 885082275511.

It is a happy number.

It is a super-2 number, since 2×1155722805880² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 14446535034 + ... + 14446535113.

Almost surely, 2^{1155722805880} is an apocalyptic number.

1155722805880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1155722805880 is an abundant number, since it is smaller than the sum of its proper divisors (1444653507440).

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

1155722805880 is a wasteful number, since it uses less digits than its factorization.

1155722805880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28893070158 (or 28893070154 counting only the distinct ones).

The product of its (nonzero) digits is 1792000, while the sum is 52.

The spelling of 1155722805880 in words is "one trillion, one hundred fifty-five billion, seven hundred twenty-two million, eight hundred five thousand, eight hundred eighty".