264403622133257 has 2 divisors, whose sum is σ = 264403622133258. Its totient is φ = 264403622133256.

The previous prime is 264403622133223. The next prime is 264403622133331. The reversal of 264403622133257 is 752331226304462.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 231665324949136 + 32738297184121 = 15220556^2 + 5721739^2 .

It is a cyclic number.

It is not a de Polignac number, because 264403622133257 - 2¹⁶ = 264403622067721 is a prime.

It is not a weakly prime, because it can be changed into another prime (264403622133557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132201811066628 + 132201811066629.

It is an arithmetic number, because the mean of its divisors is an integer number (132201811066629).

Almost surely, 2^{264403622133257} is an apocalyptic number.

It is an amenable number.

264403622133257 is a deficient number, since it is larger than the sum of its proper divisors (1).

264403622133257 is an equidigital number, since it uses as much as digits as its factorization.

264403622133257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8709120, while the sum is 50.

The spelling of 264403622133257 in words is "two hundred sixty-four trillion, four hundred three billion, six hundred twenty-two million, one hundred thirty-three thousand, two hundred fifty-seven".