11905172442 has 24 divisors (see below), whose sum is σ = 26147893044. Its totient is φ = 3914028864.

The previous prime is 11905172407. The next prime is 11905172459. The reversal of 11905172442 is 24427150911.

11905172442 is a `hidden beast` number, since 11 + 90 + 51 + 72 + 442 = 666.

11905172442 is digitally balanced in base 2 and base 5, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 11815472601 + 89699841 = 108699^2 + 9471^2 .

It is a junction number, because it is equal to n+sod(n) for n = 11905172397 and 11905172406.

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 11 ways as a sum of consecutive naturals, for example, 4528813 + ... + 4531440.

Almost surely, 2^11905172442 is an apocalyptic number.

11905172442 is an abundant number, since it is smaller than the sum of its proper divisors (14242720602).

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

11905172442 is a wasteful number, since it uses less digits than its factorization.

11905172442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9060334 (or 9060331 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The spelling of 11905172442 in words is "eleven billion, nine hundred five million, one hundred seventy-two thousand, four hundred forty-two".