11890553905 has 24 divisors (see below), whose sum is σ = 14769715176. Its totient is φ = 9189411840.

The previous prime is 11890553879. The next prime is 11890553911. The reversal of 11890553905 is 50935509811.

11890553905 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1746236944 + 10144316961 = 41788^2 + 100719^2 .

It is not a de Polignac number, because 11890553905 - 2¹³ = 11890545713 is a prime.

It is a Duffinian 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 23 ways as a sum of consecutive naturals, for example, 3231927 + ... + 3235603.

It is an arithmetic number, because the mean of its divisors is an integer number (615404799).

Almost surely, 2^11890553905 is an apocalyptic number.

It is an amenable number.

11890553905 is a deficient number, since it is larger than the sum of its proper divisors (2879161271).

11890553905 is an equidigital number, since it uses as much as digits as its factorization.

11890553905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4417 (or 4386 counting only the distinct ones).

The product of its (nonzero) digits is 243000, while the sum is 46.

The spelling of 11890553905 in words is "eleven billion, eight hundred ninety million, five hundred fifty-three thousand, nine hundred five".