11664516642434 has 4 divisors (see below), whose sum is σ = 17496774963654. Its totient is φ = 5832258321216.

The previous prime is 11664516642419. The next prime is 11664516642437. The reversal of 11664516642434 is 43424661546611.

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

It can be written as a sum of positive squares in only one way, i.e., 10525060735225 + 1139455907209 = 3244235^2 + 1067453^2 .

It is not an unprimeable number, because it can be changed into a prime (11664516642437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2916129160607 + ... + 2916129160610.

Almost surely, 2^{11664516642434} is an apocalyptic number.

11664516642434 is a deficient number, since it is larger than the sum of its proper divisors (5832258321220).

11664516642434 is an equidigital number, since it uses as much as digits as its factorization.

11664516642434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5832258321219.

The product of its digits is 9953280, while the sum is 53.

The spelling of 11664516642434 in words is "eleven trillion, six hundred sixty-four billion, five hundred sixteen million, six hundred forty-two thousand, four hundred thirty-four".