651551650 has 12 divisors (see below), whose sum is σ = 1211886162. Its totient is φ = 260620640.

The previous prime is 651551633. The next prime is 651551653. The reversal of 651551650 is 56155156.

It can be written as a sum of positive squares in 3 ways, for example, as 274531761 + 377019889 = 16569^2 + 19417^2 .

It is not an unprimeable number, because it can be changed into a prime (651551653) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6515467 + ... + 6515566.

Almost surely, 2^651551650 is an apocalyptic number.

651551650 is a deficient number, since it is larger than the sum of its proper divisors (560334512).

651551650 is a wasteful number, since it uses less digits than its factorization.

651551650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13031045 (or 13031040 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 34.

The square root of 651551650 is about 25525.5097892285. The cubic root of 651551650 is about 866.9278395971.

The spelling of 651551650 in words is "six hundred fifty-one million, five hundred fifty-one thousand, six hundred fifty".