264677017721 has 2 divisors, whose sum is σ = 264677017722. Its totient is φ = 264677017720.

The previous prime is 264677017643. The next prime is 264677017733. The reversal of 264677017721 is 127710776462.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 141704062096 + 122972955625 = 376436^2 + 350675^2 .

It is a cyclic number.

It is not a de Polignac number, because 264677017721 - 2²² = 264672823417 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 264677017721.

It is not a weakly prime, because it can be changed into another prime (264677017741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132338508860 + 132338508861.

It is an arithmetic number, because the mean of its divisors is an integer number (132338508861).

Almost surely, 2^264677017721 is an apocalyptic number.

It is an amenable number.

264677017721 is a deficient number, since it is larger than the sum of its proper divisors (1).

264677017721 is an equidigital number, since it uses as much as digits as its factorization.

264677017721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1382976, while the sum is 50.

The spelling of 264677017721 in words is "two hundred sixty-four billion, six hundred seventy-seven million, seventeen thousand, seven hundred twenty-one".