601615505605 has 4 divisors (see below), whose sum is σ = 721938606732. Its totient is φ = 481292404480.

The previous prime is 601615505581. The next prime is 601615505609. The reversal of 601615505605 is 506505516106.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 506505516106 = 2 ⋅253252758053.

It can be written as a sum of positive squares in 2 ways, for example, as 85853102049 + 515762403556 = 293007^2 + 718166^2 .

It is not a de Polignac number, because 601615505605 - 2¹⁷ = 601615374533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (601615505609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60161550556 + ... + 60161550565.

It is an arithmetic number, because the mean of its divisors is an integer number (180484651683).

Almost surely, 2^601615505605 is an apocalyptic number.

It is an amenable number.

601615505605 is a deficient number, since it is larger than the sum of its proper divisors (120323101127).

601615505605 is a wasteful number, since it uses less digits than its factorization.

601615505605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120323101126.

The product of its (nonzero) digits is 135000, while the sum is 40.

The spelling of 601615505605 in words is "six hundred one billion, six hundred fifteen million, five hundred five thousand, six hundred five".