611227664 has 20 divisors (see below), whose sum is σ = 1225090860. Its totient is φ = 295075200.

The previous prime is 611227657. The next prime is 611227681. The reversal of 611227664 is 466722116.

It can be written as a sum of positive squares in 2 ways, for example, as 440664064 + 170563600 = 20992^2 + 13060^2 .

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 658187 + ... + 659114.

It is an arithmetic number, because the mean of its divisors is an integer number (61254543).

Almost surely, 2^611227664 is an apocalyptic number.

It is an amenable number.

611227664 is an abundant number, since it is smaller than the sum of its proper divisors (613863196).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

611227664 is a wasteful number, since it uses less digits than its factorization.

611227664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1317338 (or 1317332 counting only the distinct ones).

The product of its digits is 24192, while the sum is 35.

The square root of 611227664 is about 24723.0189095102. The cubic root of 611227664 is about 848.6611744602.

It can be divided in two parts, 61122 and 7664, that added together give a palindrome (68786).

The spelling of 611227664 in words is "six hundred eleven million, two hundred twenty-seven thousand, six hundred sixty-four".