651122102440 has 32 divisors (see below), whose sum is σ = 1465113329280. Its totient is φ = 260433090112.

The previous prime is 651122102437. The next prime is 651122102453. The reversal of 651122102440 is 44201221156.

651122102440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 651122102399 and 651122102408.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 189117 + ... + 1156723.

It is an arithmetic number, because the mean of its divisors is an integer number (45784791540).

Almost surely, 2^651122102440 is an apocalyptic number.

It is an amenable number.

651122102440 is an abundant number, since it is smaller than the sum of its proper divisors (813991226840).

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

651122102440 is a wasteful number, since it uses less digits than its factorization.

651122102440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 984441 (or 984437 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

Adding to 651122102440 its reverse (44201221156), we get a palindrome (695323323596).

The spelling of 651122102440 in words is "six hundred fifty-one billion, one hundred twenty-two million, one hundred two thousand, four hundred forty".