651165133312 has 20 divisors (see below), whose sum is σ = 1301058460746. Its totient is φ = 325582566400.

The previous prime is 651165133303. The next prime is 651165133313. The reversal of 651165133312 is 213331561156.

It can be written as a sum of positive squares in only one way, i.e., 403702661376 + 247462471936 = 635376^2 + 497456^2 .

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (651165133313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 635902939 + ... + 635903962.

Almost surely, 2^651165133312 is an apocalyptic number.

It is an amenable number.

651165133312 is a deficient number, since it is larger than the sum of its proper divisors (649893327434).

651165133312 is an equidigital number, since it uses as much as digits as its factorization.

651165133312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1271806919 (or 1271806903 counting only the distinct ones).

The product of its digits is 48600, while the sum is 37.

Adding to 651165133312 its reverse (213331561156), we get a palindrome (864496694468).

The spelling of 651165133312 in words is "six hundred fifty-one billion, one hundred sixty-five million, one hundred thirty-three thousand, three hundred twelve".