11553206240161 has 2 divisors, whose sum is σ = 11553206240162. Its totient is φ = 11553206240160.

The previous prime is 11553206240119. The next prime is 11553206240231. The reversal of 11553206240161 is 16104260235511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6980798094400 + 4572408145761 = 2642120^2 + 2138319^2 .

It is a cyclic number.

It is not a de Polignac number, because 11553206240161 - 2²⁵ = 11553172685729 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11553206240161.

It is not a weakly prime, because it can be changed into another prime (11553206240761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5776603120080 + 5776603120081.

It is an arithmetic number, because the mean of its divisors is an integer number (5776603120081).

Almost surely, 2^{11553206240161} is an apocalyptic number.

It is an amenable number.

11553206240161 is a deficient number, since it is larger than the sum of its proper divisors (1).

11553206240161 is an equidigital number, since it uses as much as digits as its factorization.

11553206240161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43200, while the sum is 37.

Adding to 11553206240161 its reverse (16104260235511), we get a palindrome (27657466475672).

The spelling of 11553206240161 in words is "eleven trillion, five hundred fifty-three billion, two hundred six million, two hundred forty thousand, one hundred sixty-one".