651707712 has 42 divisors (see below), whose sum is σ = 1868004138. Its totient is φ = 217235712.

The previous prime is 651707711. The next prime is 651707723. The reversal of 651707712 is 217707156.

It can be written as a sum of positive squares in only one way, i.e., 502477056 + 149230656 = 22416^2 + 12216^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (651707711) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 565143 + ... + 566294.

It is an arithmetic number, because the mean of its divisors is an integer number (44476289).

Almost surely, 2^651707712 is an apocalyptic number.

It is an amenable number.

651707712 is an abundant number, since it is smaller than the sum of its proper divisors (1216296426).

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

651707712 is a wasteful number, since it uses less digits than its factorization.

651707712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1131455 (or 1131442 counting only the distinct ones).

The product of its (nonzero) digits is 20580, while the sum is 36.

The square root of 651707712 is about 25528.5665872567. The cubic root of 651707712 is about 866.9970506319.

The spelling of 651707712 in words is "six hundred fifty-one million, seven hundred seven thousand, seven hundred twelve".