180664332256201 has 4 divisors (see below), whose sum is σ = 180664810848900. Its totient is φ = 180663853663504.

The previous prime is 180664332256099. The next prime is 180664332256207. The reversal of 180664332256201 is 102652233466081.

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 70030202244025 + 110634130012176 = 8368405^2 + 10518276^2 .

It is a cyclic number.

It is not a de Polignac number, because 180664332256201 - 2²⁵ = 180664298701769 is a prime.

It is a super-2 number, since 2×180664332256201² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (180664332256207) 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, 238729666 + ... + 239485243.

It is an arithmetic number, because the mean of its divisors is an integer number (45166202712225).

Almost surely, 2^{180664332256201} is an apocalyptic number.

It is an amenable number.

180664332256201 is a deficient number, since it is larger than the sum of its proper divisors (478592699).

180664332256201 is an equidigital number, since it uses as much as digits as its factorization.

180664332256201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478592698.

The product of its (nonzero) digits is 2488320, while the sum is 49.

The spelling of 180664332256201 in words is "one hundred eighty trillion, six hundred sixty-four billion, three hundred thirty-two million, two hundred fifty-six thousand, two hundred one".