651485812 has 24 divisors (see below), whose sum is σ = 1187361000. Its totient is φ = 312391296.

The previous prime is 651485797. The next prime is 651485837. The reversal of 651485812 is 218584156.

It is a happy number.

651485812 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 11236 + 651474576 = 106^2 + 25524^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1563 + ... + 36130.

It is an arithmetic number, because the mean of its divisors is an integer number (49473375).

Almost surely, 2^651485812 is an apocalyptic number.

It is an amenable number.

651485812 is a deficient number, since it is larger than the sum of its proper divisors (535875188).

651485812 is a wasteful number, since it uses less digits than its factorization.

651485812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37875 (or 37873 counting only the distinct ones).

The product of its digits is 76800, while the sum is 40.

The square root of 651485812 is about 25524.2201056173. The cubic root of 651485812 is about 866.8986381681.

The spelling of 651485812 in words is "six hundred fifty-one million, four hundred eighty-five thousand, eight hundred twelve".