11661164134045 has 4 divisors (see below), whose sum is σ = 13993396960860. Its totient is φ = 9328931307232.

The previous prime is 11661164134043. The next prime is 11661164134063. The reversal of 11661164134045 is 54043146116611.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4137131592036 + 7524032542009 = 2033994^2 + 2742997^2 .

It is a cyclic number.

It is not a de Polignac number, because 11661164134045 - 2¹ = 11661164134043 is a prime.

It is a super-2 number, since 2×11661164134045² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11661164133992 and 11661164134010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11661164134043) 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, 1166116413400 + ... + 1166116413409.

It is an arithmetic number, because the mean of its divisors is an integer number (3498349240215).

Almost surely, 2^{11661164134045} is an apocalyptic number.

It is an amenable number.

11661164134045 is a deficient number, since it is larger than the sum of its proper divisors (2332232826815).

11661164134045 is an equidigital number, since it uses as much as digits as its factorization.

11661164134045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2332232826814.

The product of its (nonzero) digits is 207360, while the sum is 43.

The spelling of 11661164134045 in words is "eleven trillion, six hundred sixty-one billion, one hundred sixty-four million, one hundred thirty-four thousand, forty-five".