651648387522 has 128 divisors (see below), whose sum is σ = 1453046999040. Its totient is φ = 193183626240.

The previous prime is 651648387521. The next prime is 651648387527. The reversal of 651648387522 is 225783846156.

It is not an unprimeable number, because it can be changed into a prime (651648387521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 314957104 + ... + 314959172.

It is an arithmetic number, because the mean of its divisors is an integer number (11351929680).

Almost surely, 2^651648387522 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 651648387522, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (726523499520).

651648387522 is an abundant number, since it is smaller than the sum of its proper divisors (801398611518).

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

651648387522 is a wasteful number, since it uses less digits than its factorization.

651648387522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2728.

The product of its digits is 19353600, while the sum is 57.

The spelling of 651648387522 in words is "six hundred fifty-one billion, six hundred forty-eight million, three hundred eighty-seven thousand, five hundred twenty-two".