11451123565537 has 2 divisors, whose sum is σ = 11451123565538. Its totient is φ = 11451123565536.

The previous prime is 11451123565517. The next prime is 11451123565577. The reversal of 11451123565537 is 73556532115411.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5979154643361 + 5471968922176 = 2445231^2 + 2339224^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11451123565537 is a prime.

It is a super-2 number, since 2×11451123565537² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11451123565507) by changing a digit.

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 as a sum of consecutive naturals, namely, 5725561782768 + 5725561782769.

It is an arithmetic number, because the mean of its divisors is an integer number (5725561782769).

Almost surely, 2^{11451123565537} is an apocalyptic number.

It is an amenable number.

11451123565537 is a deficient number, since it is larger than the sum of its proper divisors (1).

11451123565537 is an equidigital number, since it uses as much as digits as its factorization.

11451123565537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1890000, while the sum is 49.

The spelling of 11451123565537 in words is "eleven trillion, four hundred fifty-one billion, one hundred twenty-three million, five hundred sixty-five thousand, five hundred thirty-seven".