617220045545 has 16 divisors (see below), whose sum is σ = 779668775040. Its totient is φ = 467774383104.

The previous prime is 617220045539. The next prime is 617220045571. The reversal of 617220045545 is 545540022716.

It is a cyclic number.

It is not a de Polignac number, because 617220045545 - 2¹⁴ = 617220029161 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4325732 + ... + 4466138.

It is an arithmetic number, because the mean of its divisors is an integer number (48729298440).

Almost surely, 2^617220045545 is an apocalyptic number.

It is an amenable number.

617220045545 is a deficient number, since it is larger than the sum of its proper divisors (162448729495).

617220045545 is a wasteful number, since it uses less digits than its factorization.

617220045545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186704.

The product of its (nonzero) digits is 336000, while the sum is 41.

The spelling of 617220045545 in words is "six hundred seventeen billion, two hundred twenty million, forty-five thousand, five hundred forty-five".