264801487338865 has 4 divisors (see below), whose sum is σ = 317761784806644. Its totient is φ = 211841189871088.

The previous prime is 264801487338859. The next prime is 264801487338889. The reversal of 264801487338865 is 568833784108462.

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 183715280413921 + 81086206924944 = 13554161^2 + 9004788^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-264801487338865 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26480148733882 + ... + 26480148733891.

It is an arithmetic number, because the mean of its divisors is an integer number (79440446201661).

Almost surely, 2^{264801487338865} is an apocalyptic number.

It is an amenable number.

264801487338865 is a deficient number, since it is larger than the sum of its proper divisors (52960297467779).

264801487338865 is an equidigital number, since it uses as much as digits as its factorization.

264801487338865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52960297467778.

The product of its (nonzero) digits is 1486356480, while the sum is 73.

The spelling of 264801487338865 in words is "two hundred sixty-four trillion, eight hundred one billion, four hundred eighty-seven million, three hundred thirty-eight thousand, eight hundred sixty-five".