549999999990 has 64 divisors (see below), whose sum is σ = 1676190481920. Its totient is φ = 125714285280.

The previous prime is 549999999959. The next prime is 550000000019. The reversal of 549999999990 is 99999999945.

It is a Harshad number since it is a multiple of its sum of digits (90).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 549999999990.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 145500756 + ... + 145504535.

It is an arithmetic number, because the mean of its divisors is an integer number (26190476280).

Almost surely, 2^549999999990 is an apocalyptic number.

549999999990 is an abundant number, since it is smaller than the sum of its proper divisors (1126190481930).

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

549999999990 is a wasteful number, since it uses less digits than its factorization.

549999999990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291005314 (or 291005308 counting only the distinct ones).

The product of its (nonzero) digits is 7748409780, while the sum is 90.

The spelling of 549999999990 in words is "five hundred forty-nine billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred ninety".