264556553 has 2 divisors, whose sum is σ = 264556554. Its totient is φ = 264556552.

The previous prime is 264556547. The next prime is 264556609. The reversal of 264556553 is 355655462.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 161594944 + 102961609 = 12712^2 + 10147^2 .

It is a cyclic number.

It is not a de Polignac number, because 264556553 - 2⁶ = 264556489 is a prime.

It is a Sophie Germain prime.

It is a Chen 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 264556553.

It is not a weakly prime, because it can be changed into another prime (264550553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132278276 + 132278277.

It is an arithmetic number, because the mean of its divisors is an integer number (132278277).

Almost surely, 2^264556553 is an apocalyptic number.

It is an amenable number.

264556553 is a deficient number, since it is larger than the sum of its proper divisors (1).

264556553 is an equidigital number, since it uses as much as digits as its factorization.

264556553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 540000, while the sum is 41.

The square root of 264556553 is about 16265.1945269646. The cubic root of 264556553 is about 641.9573482856.

The spelling of 264556553 in words is "two hundred sixty-four million, five hundred fifty-six thousand, five hundred fifty-three".