651321214720 has 144 divisors (see below), whose sum is σ = 1727351434368. Its totient is φ = 233308753920.

The previous prime is 651321214711. The next prime is 651321214723. The reversal of 651321214720 is 27412123156.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (651321214723) 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, 598147 + ... + 1288573.

It is an arithmetic number, because the mean of its divisors is an integer number (11995496072).

Almost surely, 2^651321214720 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 651321214720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (863675717184).

651321214720 is an abundant number, since it is smaller than the sum of its proper divisors (1076030219648).

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

651321214720 is a wasteful number, since it uses less digits than its factorization.

651321214720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 690526 (or 690512 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 34.

Adding to 651321214720 its reverse (27412123156), we get a palindrome (678733337876).

The spelling of 651321214720 in words is "six hundred fifty-one billion, three hundred twenty-one million, two hundred fourteen thousand, seven hundred twenty".