11491919040 has 168 divisors, whose sum is σ = 42444052272. Its totient is φ = 2626713600.

The previous prime is 11491919039. The next prime is 11491919057. The reversal of 11491919040 is 4091919411.

It is a tau number, because it is divible by the number of its divisors (168).

It is a self number, because there is not a number n which added to its sum of digits gives 11491919040.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 75111 + ... + 169190.

Almost surely, 2^11491919040 is an apocalyptic number.

11491919040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11491919040 is an abundant number, since it is smaller than the sum of its proper divisors (30952133232).

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

11491919040 is a wasteful number, since it uses less digits than its factorization.

11491919040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244335 (or 244318 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 39.

The spelling of 11491919040 in words is "eleven billion, four hundred ninety-one million, nine hundred nineteen thousand, forty".