651080320 has 128 divisors (see below), whose sum is σ = 1772254080. Its totient is φ = 226406400.

The previous prime is 651080291. The next prime is 651080333. The reversal of 651080320 is 23080156.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 159910 + ... + 163930.

It is an arithmetic number, because the mean of its divisors is an integer number (13845735).

Almost surely, 2^651080320 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 651080320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (886127040).

651080320 is an abundant number, since it is smaller than the sum of its proper divisors (1121173760).

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

651080320 is a wasteful number, since it uses less digits than its factorization.

651080320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4074 (or 4062 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 651080320 is about 25516.2755902973. The cubic root of 651080320 is about 866.7187450625.

The spelling of 651080320 in words is "six hundred fifty-one million, eighty thousand, three hundred twenty".