651378749568 has 256 divisors, whose sum is σ = 1852086297600. Its totient is φ = 202387046400.

The previous prime is 651378749521. The next prime is 651378749573. The reversal of 651378749568 is 865947873156.

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 31 ways as a sum of consecutive naturals, for example, 159142530 + ... + 159146622.

It is an arithmetic number, because the mean of its divisors is an integer number (7234712100).

Almost surely, 2^651378749568 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 651378749568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (926043148800).

651378749568 is an abundant number, since it is smaller than the sum of its proper divisors (1200707548032).

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

651378749568 is a wasteful number, since it uses less digits than its factorization.

651378749568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4631 (or 4619 counting only the distinct ones).

The product of its digits is 304819200, while the sum is 69.

The spelling of 651378749568 in words is "six hundred fifty-one billion, three hundred seventy-eight million, seven hundred forty-nine thousand, five hundred sixty-eight".