11505426320 has 40 divisors (see below), whose sum is σ = 26870113536. Its totient is φ = 4581525888.

The previous prime is 11505426319. The next prime is 11505426323. The reversal of 11505426320 is 2362450511.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (11505426323) 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, 304622 + ... + 340301.

Almost surely, 2^11505426320 is an apocalyptic number.

11505426320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11505426320 is an abundant number, since it is smaller than the sum of its proper divisors (15364687216).

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

11505426320 is a wasteful number, since it uses less digits than its factorization.

11505426320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645159 (or 645153 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

Adding to 11505426320 its reverse (2362450511), we get a palindrome (13867876831).

The spelling of 11505426320 in words is "eleven billion, five hundred five million, four hundred twenty-six thousand, three hundred twenty".