617655542785 has 16 divisors (see below), whose sum is σ = 746433273600. Its totient is φ = 490638606976.

The previous prime is 617655542783. The next prime is 617655542789. The reversal of 617655542785 is 587245556716.

It is a cyclic number.

It is not a de Polignac number, because 617655542785 - 2¹ = 617655542783 is a prime.

It is not an unprimeable number, because it can be changed into a prime (617655542783) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 330100 + ... + 1159429.

It is an arithmetic number, because the mean of its divisors is an integer number (46652079600).

Almost surely, 2^617655542785 is an apocalyptic number.

It is an amenable number.

617655542785 is a deficient number, since it is larger than the sum of its proper divisors (128777730815).

617655542785 is a wasteful number, since it uses less digits than its factorization.

617655542785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1490120.

The product of its digits is 70560000, while the sum is 61.

The spelling of 617655542785 in words is "six hundred seventeen billion, six hundred fifty-five million, five hundred forty-two thousand, seven hundred eighty-five".