11640610321 has 4 divisors (see below), whose sum is σ = 11860244532. Its totient is φ = 11420976112.

The previous prime is 11640610229. The next prime is 11640610327. The reversal of 11640610321 is 12301604611.

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 5859137025 + 5781473296 = 76545^2 + 76036^2 .

It is a cyclic number.

It is not a de Polignac number, because 11640610321 - 2⁷ = 11640610193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11640610327) 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, 109817026 + ... + 109817131.

It is an arithmetic number, because the mean of its divisors is an integer number (2965061133).

Almost surely, 2^11640610321 is an apocalyptic number.

It is an amenable number.

11640610321 is a deficient number, since it is larger than the sum of its proper divisors (219634211).

11640610321 is an equidigital number, since it uses as much as digits as its factorization.

11640610321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219634210.

The product of its (nonzero) digits is 864, while the sum is 25.

The spelling of 11640610321 in words is "eleven billion, six hundred forty million, six hundred ten thousand, three hundred twenty-one".