11451306544521 has 32 divisors (see below), whose sum is σ = 15478989926400. Its totient is φ = 7529134679040.

The previous prime is 11451306544519. The next prime is 11451306544523. The reversal of 11451306544521 is 12544560315411.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (11451306544519) and next prime (11451306544523).

It is not a de Polignac number, because 11451306544521 - 2¹ = 11451306544519 is a prime.

It is a super-2 number, since 2×11451306544521² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11451306544523) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1233839401 + ... + 1233848681.

It is an arithmetic number, because the mean of its divisors is an integer number (483718435200).

Almost surely, 2^{11451306544521} is an apocalyptic number.

It is an amenable number.

11451306544521 is a deficient number, since it is larger than the sum of its proper divisors (4027683381879).

11451306544521 is a wasteful number, since it uses less digits than its factorization.

11451306544521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14629.

The product of its (nonzero) digits is 288000, while the sum is 42.

Adding to 11451306544521 its reverse (12544560315411), we get a palindrome (23995866859932).

The spelling of 11451306544521 in words is "eleven trillion, four hundred fifty-one billion, three hundred six million, five hundred forty-four thousand, five hundred twenty-one".