155264609 has 2 divisors, whose sum is σ = 155264610. Its totient is φ = 155264608.

The previous prime is 155264537. The next prime is 155264611. The reversal of 155264609 is 906462551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 142874209 + 12390400 = 11953^2 + 3520^2 .

It is a cyclic number.

It is not a de Polignac number, because 155264609 - 2¹² = 155260513 is a prime.

Together with 155264611, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (155264209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77632304 + 77632305.

It is an arithmetic number, because the mean of its divisors is an integer number (77632305).

Almost surely, 2^155264609 is an apocalyptic number.

It is an amenable number.

155264609 is a deficient number, since it is larger than the sum of its proper divisors (1).

155264609 is an equidigital number, since it uses as much as digits as its factorization.

155264609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64800, while the sum is 38.

The square root of 155264609 is about 12460.5220195624. The cubic root of 155264609 is about 537.4740383350.

The spelling of 155264609 in words is "one hundred fifty-five million, two hundred sixty-four thousand, six hundred nine".