555265691 has 2 divisors, whose sum is σ = 555265692. Its totient is φ = 555265690.

The previous prime is 555265637. The next prime is 555265723. The reversal of 555265691 is 196562555.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-555265691 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (555265621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 277632845 + 277632846.

It is an arithmetic number, because the mean of its divisors is an integer number (277632846).

Almost surely, 2^555265691 is an apocalyptic number.

555265691 is a deficient number, since it is larger than the sum of its proper divisors (1).

555265691 is an equidigital number, since it uses as much as digits as its factorization.

555265691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 405000, while the sum is 44.

The square root of 555265691 is about 23564.0762814926. The cubic root of 555265691 is about 821.9276930771.

The spelling of 555265691 in words is "five hundred fifty-five million, two hundred sixty-five thousand, six hundred ninety-one".