1154224920881 has 4 divisors (see below), whose sum is σ = 1154343959652. Its totient is φ = 1154105882112.

The previous prime is 1154224920857. The next prime is 1154224920949. The reversal of 1154224920881 is 1880294224511.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 741649938481 + 412574982400 = 861191^2 + 642320^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1154224920881 is a prime.

It is a super-2 number, since 2×1154224920881² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1154224920811) 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 3 ways as a sum of consecutive naturals, for example, 59504840 + ... + 59524233.

It is an arithmetic number, because the mean of its divisors is an integer number (288585989913).

Almost surely, 2^{1154224920881} is an apocalyptic number.

It is an amenable number.

1154224920881 is a deficient number, since it is larger than the sum of its proper divisors (119038771).

1154224920881 is an equidigital number, since it uses as much as digits as its factorization.

1154224920881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119038770.

The product of its (nonzero) digits is 368640, while the sum is 47.

The spelling of 1154224920881 in words is "one trillion, one hundred fifty-four billion, two hundred twenty-four million, nine hundred twenty thousand, eight hundred eighty-one".