11640331445 has 4 divisors (see below), whose sum is σ = 13968397740. Its totient is φ = 9312265152.

The previous prime is 11640331429. The next prime is 11640331457. The reversal of 11640331445 is 54413304611.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54413304611 = 41 ⋅1327153771.

It can be written as a sum of positive squares in 2 ways, for example, as 7358723089 + 4281608356 = 85783^2 + 65434^2 .

It is a cyclic number.

It is not a de Polignac number, because 11640331445 - 2⁴ = 11640331429 is a prime.

It is a super-2 number, since 2×11640331445² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 1164033140 + ... + 1164033149.

It is an arithmetic number, because the mean of its divisors is an integer number (3492099435).

Almost surely, 2^11640331445 is an apocalyptic number.

It is an amenable number.

11640331445 is a deficient number, since it is larger than the sum of its proper divisors (2328066295).

11640331445 is an equidigital number, since it uses as much as digits as its factorization.

11640331445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2328066294.

The product of its (nonzero) digits is 17280, while the sum is 32.

The spelling of 11640331445 in words is "eleven billion, six hundred forty million, three hundred thirty-one thousand, four hundred forty-five".