17121890490 has 16 divisors (see below), whose sum is σ = 41092537248. Its totient is φ = 4565837456.

The previous prime is 17121890473. The next prime is 17121890497. The reversal of 17121890490 is 9409812171.

It is not an unprimeable number, because it can be changed into a prime (17121890497) 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 7 ways as a sum of consecutive naturals, for example, 285364812 + ... + 285364871.

It is an arithmetic number, because the mean of its divisors is an integer number (2568283578).

Almost surely, 2^17121890490 is an apocalyptic number.

17121890490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

17121890490 is an abundant number, since it is smaller than the sum of its proper divisors (23970646758).

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

17121890490 is a wasteful number, since it uses less digits than its factorization.

17121890490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570729693.

The product of its (nonzero) digits is 36288, while the sum is 42.

The spelling of 17121890490 in words is "seventeen billion, one hundred twenty-one million, eight hundred ninety thousand, four hundred ninety".