264506651501321 has 4 divisors (see below), whose sum is σ = 264522191536644. Its totient is φ = 264491111466000.

The previous prime is 264506651501311. The next prime is 264506651501347. The reversal of 264506651501321 is 123105156605462.

It is a happy number.

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 227597624422921 + 36909027078400 = 15086339^2 + 6075280^2 .

It is a cyclic number.

It is not a de Polignac number, because 264506651501321 - 2³⁰ = 264505577759497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (264506651501311) 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, 7769992130 + ... + 7770026171.

It is an arithmetic number, because the mean of its divisors is an integer number (66130547884161).

Almost surely, 2^{264506651501321} is an apocalyptic number.

It is an amenable number.

264506651501321 is a deficient number, since it is larger than the sum of its proper divisors (15540035323).

264506651501321 is a wasteful number, since it uses less digits than its factorization.

264506651501321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15540035322.

The product of its (nonzero) digits is 1296000, while the sum is 47.

The spelling of 264506651501321 in words is "two hundred sixty-four trillion, five hundred six billion, six hundred fifty-one million, five hundred one thousand, three hundred twenty-one".