11451123566503 has 8 divisors (see below), whose sum is σ = 11733955494800. Its totient is φ = 11169042853248.

The previous prime is 11451123566483. The next prime is 11451123566537. The reversal of 11451123566503 is 30566532115411.

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 11451123566503 - 2⁵ = 11451123566471 is a prime.

It is a super-2 number, since 2×11451123566503² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11451123566503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11451123567503) 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, 187772898 + ... + 187833871.

It is an arithmetic number, because the mean of its divisors is an integer number (1466744436850).

Almost surely, 2^{11451123566503} is an apocalyptic number.

11451123566503 is a deficient number, since it is larger than the sum of its proper divisors (282831928297).

11451123566503 is an equidigital number, since it uses as much as digits as its factorization.

11451123566503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375607521.

The product of its (nonzero) digits is 324000, while the sum is 43.

The spelling of 11451123566503 in words is "eleven trillion, four hundred fifty-one billion, one hundred twenty-three million, five hundred sixty-six thousand, five hundred three".