11279809590 has 128 divisors (see below), whose sum is σ = 31313737728. Its totient is φ = 2547210240.

The previous prime is 11279809561. The next prime is 11279809631. The reversal of 11279809590 is 9590897211.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6346782 + ... + 6348558.

It is an arithmetic number, because the mean of its divisors is an integer number (244638576).

Almost surely, 2^11279809590 is an apocalyptic number.

11279809590 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 11279809590, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15656868864).

11279809590 is an abundant number, since it is smaller than the sum of its proper divisors (20033928138).

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

11279809590 is a wasteful number, since it uses less digits than its factorization.

11279809590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2142.

The product of its (nonzero) digits is 408240, while the sum is 51.

The spelling of 11279809590 in words is "eleven billion, two hundred seventy-nine million, eight hundred nine thousand, five hundred ninety".