1155722805881 has 32 divisors (see below), whose sum is σ = 1478166589440. Its totient is φ = 880740679104.

The previous prime is 1155722805869. The next prime is 1155722805917. The reversal of 1155722805881 is 1885082275511.

It is a cyclic number.

It is not a de Polignac number, because 1155722805881 - 2¹⁰ = 1155722804857 is a prime.

It is a super-2 number, since 2×1155722805881² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1155722885881) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3402125 + ... + 3726378.

It is an arithmetic number, because the mean of its divisors is an integer number (46192705920).

Almost surely, 2^{1155722805881} is an apocalyptic number.

It is an amenable number.

1155722805881 is a deficient number, since it is larger than the sum of its proper divisors (322443783559).

1155722805881 is a wasteful number, since it uses less digits than its factorization.

1155722805881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7128605.

The product of its (nonzero) digits is 1792000, while the sum is 53.

The spelling of 1155722805881 in words is "one trillion, one hundred fifty-five billion, seven hundred twenty-two million, eight hundred five thousand, eight hundred eighty-one".