264271987201 has 4 divisors (see below), whose sum is σ = 265056177412. Its totient is φ = 263487796992.

The previous prime is 264271987169. The next prime is 264271987211. The reversal of 264271987201 is 102789172462.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 102789172462 = 2 ⋅51394586231.

It can be written as a sum of positive squares in 2 ways, for example, as 154594444225 + 109677542976 = 393185^2 + 331176^2 .

It is a cyclic number.

It is not a de Polignac number, because 264271987201 - 2⁵ = 264271987169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (264271987211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 392094600 + ... + 392095273.

It is an arithmetic number, because the mean of its divisors is an integer number (66264044353).

Almost surely, 2^264271987201 is an apocalyptic number.

It is an amenable number.

264271987201 is a deficient number, since it is larger than the sum of its proper divisors (784190211).

264271987201 is an equidigital number, since it uses as much as digits as its factorization.

264271987201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 784190210.

The product of its (nonzero) digits is 677376, while the sum is 49.

The spelling of 264271987201 in words is "two hundred sixty-four billion, two hundred seventy-one million, nine hundred eighty-seven thousand, two hundred one".