1109957415881 has 2 divisors, whose sum is σ = 1109957415882. Its totient is φ = 1109957415880.

The previous prime is 1109957415839. The next prime is 1109957415913. The reversal of 1109957415881 is 1885147599011.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 608953926025 + 501003489856 = 780355^2 + 707816^2 .

It is a cyclic number.

It is not a de Polignac number, because 1109957415881 - 2¹⁸ = 1109957153737 is a prime.

It is a super-2 number, since 2×1109957415881² (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 1109957415881.

It is not a weakly prime, because it can be changed into another prime (1109957615881) 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 as a sum of consecutive naturals, namely, 554978707940 + 554978707941.

It is an arithmetic number, because the mean of its divisors is an integer number (554978707941).

Almost surely, 2^{1109957415881} is an apocalyptic number.

It is an amenable number.

1109957415881 is a deficient number, since it is larger than the sum of its proper divisors (1).

1109957415881 is an equidigital number, since it uses as much as digits as its factorization.

1109957415881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3628800, while the sum is 59.

The spelling of 1109957415881 in words is "one trillion, one hundred nine billion, nine hundred fifty-seven million, four hundred fifteen thousand, eight hundred eighty-one".