11543312551 has 8 divisors (see below), whose sum is σ = 11918144000. Its totient is φ = 11168635320.

The previous prime is 11543312527. The next prime is 11543312567. The reversal of 11543312551 is 15521334511.

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 11543312551 - 2²⁹ = 11006441639 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11543312351) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124600 + ... + 196498.

It is an arithmetic number, because the mean of its divisors is an integer number (1489768000).

Almost surely, 2^11543312551 is an apocalyptic number.

11543312551 is a deficient number, since it is larger than the sum of its proper divisors (374831449).

11543312551 is an equidigital number, since it uses as much as digits as its factorization.

11543312551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77109.

The product of its digits is 9000, while the sum is 31.

The spelling of 11543312551 in words is "eleven billion, five hundred forty-three million, three hundred twelve thousand, five hundred fifty-one".