651318801336 has 160 divisors (see below), whose sum is σ = 2089419171840. Its totient is φ = 185688562752.

The previous prime is 651318801299. The next prime is 651318801337. The reversal of 651318801336 is 633108813156.

651318801336 is a `hidden beast` number, since 6 + 513 + 18 + 80 + 13 + 36 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 651318801291 and 651318801300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (651318801337) 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 in 39 ways as a sum of consecutive naturals, for example, 1945105 + ... + 2255231.

It is an arithmetic number, because the mean of its divisors is an integer number (13058869824).

Almost surely, 2^651318801336 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 651318801336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1044709585920).

651318801336 is an abundant number, since it is smaller than the sum of its proper divisors (1438100370504).

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

651318801336 is a wasteful number, since it uses less digits than its factorization.

651318801336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310615 (or 310602 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The spelling of 651318801336 in words is "six hundred fifty-one billion, three hundred eighteen million, eight hundred one thousand, three hundred thirty-six".