617440065 has 16 divisors (see below), whose sum is σ = 1077713856. Its totient is φ = 299364800.

The previous prime is 617439997. The next prime is 617440067. The reversal of 617440065 is 560044716.

It is not a de Polignac number, because 617440065 - 2⁷ = 617439937 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (617440067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1870866 + ... + 1871195.

It is an arithmetic number, because the mean of its divisors is an integer number (67357116).

Almost surely, 2^617440065 is an apocalyptic number.

It is an amenable number.

617440065 is a deficient number, since it is larger than the sum of its proper divisors (460273791).

617440065 is a wasteful number, since it uses less digits than its factorization.

617440065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3742080.

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 617440065 is about 24848.3412927302. The cubic root of 617440065 is about 851.5266979859.

The spelling of 617440065 in words is "six hundred seventeen million, four hundred forty thousand, sixty-five".