264857487709 has 2 divisors, whose sum is σ = 264857487710. Its totient is φ = 264857487708.

The previous prime is 264857487707. The next prime is 264857487731. The reversal of 264857487709 is 907784758462.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 263351659684 + 1505828025 = 513178^2 + 38805^2 .

It is a cyclic number.

It is not a de Polignac number, because 264857487709 - 2¹ = 264857487707 is a prime.

Together with 264857487707, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (264857487703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132428743854 + 132428743855.

It is an arithmetic number, because the mean of its divisors is an integer number (132428743855).

Almost surely, 2^264857487709 is an apocalyptic number.

It is an amenable number.

264857487709 is a deficient number, since it is larger than the sum of its proper divisors (1).

264857487709 is an equidigital number, since it uses as much as digits as its factorization.

264857487709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 189665280, while the sum is 67.

The spelling of 264857487709 in words is "two hundred sixty-four billion, eight hundred fifty-seven million, four hundred eighty-seven thousand, seven hundred nine".