651967568 has 80 divisors (see below), whose sum is σ = 1543401216. Its totient is φ = 260705280.

The previous prime is 651967567. The next prime is 651967579. The reversal of 651967568 is 865769156.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (651967567) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102530 + ... + 108702.

Almost surely, 2^651967568 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 651967568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (771700608).

651967568 is an abundant number, since it is smaller than the sum of its proper divisors (891433648).

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

651967568 is a wasteful number, since it uses less digits than its factorization.

651967568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6252 (or 6246 counting only the distinct ones).

The product of its digits is 2721600, while the sum is 53.

The square root of 651967568 is about 25533.6555941369. The cubic root of 651967568 is about 867.1122681567.

The spelling of 651967568 in words is "six hundred fifty-one million, nine hundred sixty-seven thousand, five hundred sixty-eight".