4918191990 has 32 divisors (see below), whose sum is σ = 12424907520. Its totient is φ = 1242490464.

The previous prime is 4918191979. The next prime is 4918192043. The reversal of 4918191990 is 991918194.

It is a super-2 number, since 2×4918191990² = 48377224901000320200, which contains 22 as substring.

It is a Curzon number.

It is a congruent 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 15 ways as a sum of consecutive naturals, for example, 4313634 + ... + 4314773.

It is an arithmetic number, because the mean of its divisors is an integer number (388278360).

Almost surely, 2^4918191990 is an apocalyptic number.

4918191990 is an abundant number, since it is smaller than the sum of its proper divisors (7506715530).

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

4918191990 is a wasteful number, since it uses less digits than its factorization.

4918191990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8628436.

The product of its (nonzero) digits is 209952, while the sum is 51.

The square root of 4918191990 is about 70129.8224010299. The cubic root of 4918191990 is about 1700.5986346173.

The spelling of 4918191990 in words is "four billion, nine hundred eighteen million, one hundred ninety-one thousand, nine hundred ninety".