651818560 has 112 divisors (see below), whose sum is σ = 1669328640. Its totient is φ = 241643520.

The previous prime is 651818543. The next prime is 651818567. The reversal of 651818560 is 65818156.

651818560 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (651818567) 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, 284620 + ... + 286900.

It is an arithmetic number, because the mean of its divisors is an integer number (14904720).

Almost surely, 2^651818560 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 651818560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (834664320).

651818560 is an abundant number, since it is smaller than the sum of its proper divisors (1017510080).

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

651818560 is a wasteful number, since it uses less digits than its factorization.

651818560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2364 (or 2354 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 40.

The square root of 651818560 is about 25530.7375529968. The cubic root of 651818560 is about 867.0462032602.

The spelling of 651818560 in words is "six hundred fifty-one million, eight hundred eighteen thousand, five hundred sixty".