651328945 has 8 divisors (see below), whose sum is σ = 802719144. Its totient is φ = 506980224.

The previous prime is 651328913. The next prime is 651328957. The reversal of 651328945 is 549823156.

It can be written as a sum of positive squares in 4 ways, for example, as 35892081 + 615436864 = 5991^2 + 24808^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 651328945 - 2⁵ = 651328913 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1760164 + ... + 1760533.

It is an arithmetic number, because the mean of its divisors is an integer number (100339893).

Almost surely, 2^651328945 is an apocalyptic number.

It is an amenable number.

651328945 is a deficient number, since it is larger than the sum of its proper divisors (151390199).

651328945 is a wasteful number, since it uses less digits than its factorization.

651328945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3520739.

The product of its digits is 259200, while the sum is 43.

The square root of 651328945 is about 25521.1470157593. The cubic root of 651328945 is about 866.8290543019.

The spelling of 651328945 in words is "six hundred fifty-one million, three hundred twenty-eight thousand, nine hundred forty-five".