11451135309961 has 2 divisors, whose sum is σ = 11451135309962. Its totient is φ = 11451135309960.

The previous prime is 11451135309953. The next prime is 11451135310151. The reversal of 11451135309961 is 16990353115411.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9530458076736 + 1920677233225 = 3087144^2 + 1385885^2 .

It is a cyclic number.

It is not a de Polignac number, because 11451135309961 - 2³ = 11451135309953 is a prime.

It is a super-2 number, since 2×11451135309961² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11451135109961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5725567654980 + 5725567654981.

It is an arithmetic number, because the mean of its divisors is an integer number (5725567654981).

Almost surely, 2^{11451135309961} is an apocalyptic number.

It is an amenable number.

11451135309961 is a deficient number, since it is larger than the sum of its proper divisors (1).

11451135309961 is an equidigital number, since it uses as much as digits as its factorization.

11451135309961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 437400, while the sum is 49.

The spelling of 11451135309961 in words is "eleven trillion, four hundred fifty-one billion, one hundred thirty-five million, three hundred nine thousand, nine hundred sixty-one".