651610612 has 36 divisors (see below), whose sum is σ = 1214571820. Its totient is φ = 305823744.

The previous prime is 651610591. The next prime is 651610627. The reversal of 651610612 is 216016156.

It can be written as a sum of positive squares in 6 ways, for example, as 183494116 + 468116496 = 13546^2 + 21636^2 .

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 846964 + ... + 847732.

Almost surely, 2^651610612 is an apocalyptic number.

It is an amenable number.

651610612 is a deficient number, since it is larger than the sum of its proper divisors (562961208).

651610612 is a wasteful number, since it uses less digits than its factorization.

651610612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1540 (or 1521 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 651610612 is about 25526.6647253416. The cubic root of 651610612 is about 866.9539896127.

Adding to 651610612 its reverse (216016156), we get a palindrome (867626768).

The spelling of 651610612 in words is "six hundred fifty-one million, six hundred ten thousand, six hundred twelve".