11491953555 has 8 divisors (see below), whose sum is σ = 18387125712. Its totient is φ = 6129041888.

The previous prime is 11491953523. The next prime is 11491953563. The reversal of 11491953555 is 55535919411.

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

It is a cyclic number.

It is not a de Polignac number, because 11491953555 - 2⁵ = 11491953523 is a prime.

It is an unprimeable number.

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, 383065104 + ... + 383065133.

It is an arithmetic number, because the mean of its divisors is an integer number (2298390714).

Almost surely, 2^11491953555 is an apocalyptic number.

11491953555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11491953555 is a deficient number, since it is larger than the sum of its proper divisors (6895172157).

11491953555 is an equidigital number, since it uses as much as digits as its factorization.

11491953555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 766130245.

The product of its digits is 607500, while the sum is 48.

The spelling of 11491953555 in words is "eleven billion, four hundred ninety-one million, nine hundred fifty-three thousand, five hundred fifty-five".