11018721590 has 8 divisors (see below), whose sum is σ = 19833698880. Its totient is φ = 4407488632.

The previous prime is 11018721589. The next prime is 11018721599. The reversal of 11018721590 is 9512781011.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 11018721590.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11018721599) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 550936070 + ... + 550936089.

It is an arithmetic number, because the mean of its divisors is an integer number (2479212360).

Almost surely, 2^11018721590 is an apocalyptic number.

11018721590 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11018721590 is a deficient number, since it is larger than the sum of its proper divisors (8814977290).

11018721590 is a wasteful number, since it uses less digits than its factorization.

11018721590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1101872166.

The product of its (nonzero) digits is 5040, while the sum is 35.

The spelling of 11018721590 in words is "eleven billion, eighteen million, seven hundred twenty-one thousand, five hundred ninety".