601615505609 has 2 divisors, whose sum is σ = 601615505610. Its totient is φ = 601615505608.

The previous prime is 601615505581. The next prime is 601615505657. The reversal of 601615505609 is 906505516106.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 601017214009 + 598291600 = 775253^2 + 24460^2 .

It is a cyclic number.

It is not a de Polignac number, because 601615505609 - 2⁸ = 601615505353 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 601615505609.

It is not a weakly prime, because it can be changed into another prime (601615505009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 300807752804 + 300807752805.

It is an arithmetic number, because the mean of its divisors is an integer number (300807752805).

Almost surely, 2^601615505609 is an apocalyptic number.

It is an amenable number.

601615505609 is a deficient number, since it is larger than the sum of its proper divisors (1).

601615505609 is an equidigital number, since it uses as much as digits as its factorization.

601615505609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 243000, while the sum is 44.

The spelling of 601615505609 in words is "six hundred one billion, six hundred fifteen million, five hundred five thousand, six hundred nine".