11621431040 has 36 divisors (see below), whose sum is σ = 27836962104. Its totient is φ = 4648571904.

The previous prime is 11621431039. The next prime is 11621431057. The reversal of 11621431040 is 4013412611.

It is a junction number, because it is equal to n+sod(n) for n = 11621430997 and 11621431015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4538342 + ... + 4540901.

Almost surely, 2^11621431040 is an apocalyptic number.

11621431040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11621431040 is an abundant number, since it is smaller than the sum of its proper divisors (16215531064).

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

11621431040 is an frugal number, since it uses more digits than its factorization.

11621431040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9079264 (or 9079250 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 11621431040 its reverse (4013412611), we get a palindrome (15634843651).

The spelling of 11621431040 in words is "eleven billion, six hundred twenty-one million, four hundred thirty-one thousand, forty".