264788145481 has 4 divisors (see below), whose sum is σ = 264790662292. Its totient is φ = 264785628672.

The previous prime is 264788145467. The next prime is 264788145499. The reversal of 264788145481 is 184541887462.

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: 184541887462 = 2 ⋅92270943731.

It can be written as a sum of positive squares in 2 ways, for example, as 160407459081 + 104380686400 = 400509^2 + 323080^2 .

It is a cyclic number.

It is not a de Polignac number, because 264788145481 - 2¹⁹ = 264787621193 is a prime.

It is a super-2 number, since 2×264788145481² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64788145481) 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, 1093380 + ... + 1313413.

It is an arithmetic number, because the mean of its divisors is an integer number (66197665573).

Almost surely, 2^264788145481 is an apocalyptic number.

It is an amenable number.

264788145481 is a deficient number, since it is larger than the sum of its proper divisors (2516811).

264788145481 is a wasteful number, since it uses less digits than its factorization.

264788145481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2516810.

The product of its digits is 13762560, while the sum is 58.

The spelling of 264788145481 in words is "two hundred sixty-four billion, seven hundred eighty-eight million, one hundred forty-five thousand, four hundred eighty-one".