651510468 has 108 divisors (see below), whose sum is σ = 1924273260. Its totient is φ = 185318784.

The previous prime is 651510451. The next prime is 651510469. The reversal of 651510468 is 864015156.

It can be written as a sum of positive squares in 2 ways, for example, as 374887044 + 276623424 = 19362^2 + 16632^2 .

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

It is not an unprimeable number, because it can be changed into a prime (651510469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 473830 + ... + 475202.

It is an arithmetic number, because the mean of its divisors is an integer number (17817345).

Almost surely, 2^651510468 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 651510468, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (962136630).

651510468 is an abundant number, since it is smaller than the sum of its proper divisors (1272762792).

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

651510468 is a wasteful number, since it uses less digits than its factorization.

651510468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1666 (or 1654 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 651510468 is about 25524.7030932781. The cubic root of 651510468 is about 866.9095741868.

The spelling of 651510468 in words is "six hundred fifty-one million, five hundred ten thousand, four hundred sixty-eight".