651612120222 has 64 divisors (see below), whose sum is σ = 1527126257664. Its totient is φ = 181467336960.

The previous prime is 651612120179. The next prime is 651612120259. The reversal of 651612120222 is 222021216156.

It is a self number, because there is not a number n which added to its sum of digits gives 651612120222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1709043 + ... + 2055249.

It is an arithmetic number, because the mean of its divisors is an integer number (23861347776).

Almost surely, 2^651612120222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 651612120222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (763563128832).

651612120222 is an abundant number, since it is smaller than the sum of its proper divisors (875514137442).

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

651612120222 is a wasteful number, since it uses less digits than its factorization.

651612120222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347353.

The product of its (nonzero) digits is 5760, while the sum is 30.

Adding to 651612120222 its reverse (222021216156), we get a palindrome (873633336378).

The spelling of 651612120222 in words is "six hundred fifty-one billion, six hundred twelve million, one hundred twenty thousand, two hundred twenty-two".