649042176 has 72 divisors (see below), whose sum is σ = 1764249984. Its totient is φ = 211732480.

The previous prime is 649042171. The next prime is 649042181. The reversal of 649042176 is 671240946.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (649042171) and next prime (649042181).

It is not an unprimeable number, because it can be changed into a prime (649042171) 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 7 ways as a sum of consecutive naturals, for example, 27106 + ... + 45086.

It is an arithmetic number, because the mean of its divisors is an integer number (24503472).

Almost surely, 2^649042176 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 649042176, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (882124992).

649042176 is an abundant number, since it is smaller than the sum of its proper divisors (1115207808).

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

649042176 is a wasteful number, since it uses less digits than its factorization.

649042176 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18047 (or 18033 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 649042176 is about 25476.3061686737. The cubic root of 649042176 is about 865.8134066317.

The spelling of 649042176 in words is "six hundred forty-nine million, forty-two thousand, one hundred seventy-six".