264111557 has 2 divisors, whose sum is σ = 264111558. Its totient is φ = 264111556.

The previous prime is 264111527. The next prime is 264111563. The reversal of 264111557 is 755111462.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 198274561 + 65836996 = 14081^2 + 8114^2 .

It is a cyclic number.

It is not a de Polignac number, because 264111557 - 2¹⁸ = 263849413 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (264111527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132055778 + 132055779.

It is an arithmetic number, because the mean of its divisors is an integer number (132055779).

Almost surely, 2^264111557 is an apocalyptic number.

It is an amenable number.

264111557 is a deficient number, since it is larger than the sum of its proper divisors (1).

264111557 is an equidigital number, since it uses as much as digits as its factorization.

264111557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8400, while the sum is 32.

The square root of 264111557 is about 16251.5093760549. The cubic root of 264111557 is about 641.5972125946.

The spelling of 264111557 in words is "two hundred sixty-four million, one hundred eleven thousand, five hundred fifty-seven".