11541004451 has 4 divisors (see below), whose sum is σ = 11624033400. Its totient is φ = 11457975504.

The previous prime is 11541004441. The next prime is 11541004457. The reversal of 11541004451 is 15440014511.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11541004451 is a prime.

It is a super-2 number, since 2×11541004451² (a number of 21 digits) contains 22 as substring.

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 11541004451.

It is not an unprimeable number, because it can be changed into a prime (11541004457) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41514266 + ... + 41514543.

It is an arithmetic number, because the mean of its divisors is an integer number (2906008350).

Almost surely, 2^11541004451 is an apocalyptic number.

11541004451 is a deficient number, since it is larger than the sum of its proper divisors (83028949).

11541004451 is an equidigital number, since it uses as much as digits as its factorization.

11541004451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83028948.

The product of its (nonzero) digits is 1600, while the sum is 26.

Adding to 11541004451 its reverse (15440014511), we get a palindrome (26981018962).

The spelling of 11541004451 in words is "eleven billion, five hundred forty-one million, four thousand, four hundred fifty-one".