651647716720 has 480 divisors, whose sum is σ = 2060802850176. Its totient is φ = 186466959360.

The previous prime is 651647716717. The next prime is 651647716747. The reversal of 651647716720 is 27617746156.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 170007924 + ... + 170011756.

Almost surely, 2^651647716720 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 651647716720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1030401425088).

651647716720 is an abundant number, since it is smaller than the sum of its proper divisors (1409155133456).

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

651647716720 is a wasteful number, since it uses less digits than its factorization.

651647716720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4081 (or 4064 counting only the distinct ones).

The product of its (nonzero) digits is 2963520, while the sum is 52.

The spelling of 651647716720 in words is "six hundred fifty-one billion, six hundred forty-seven million, seven hundred sixteen thousand, seven hundred twenty".