51643556322 has 32 divisors (see below), whose sum is σ = 107789063040. Its totient is φ = 16464349440.

The previous prime is 51643556303. The next prime is 51643556329. The reversal of 51643556322 is 22365534615.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (51643556329) by changing a digit.

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, 2388922 + ... + 2410442.

It is an arithmetic number, because the mean of its divisors is an integer number (3368408220).

Almost surely, 2^51643556322 is an apocalyptic number.

51643556322 is an abundant number, since it is smaller than the sum of its proper divisors (56145506718).

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

51643556322 is a wasteful number, since it uses less digits than its factorization.

51643556322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38938.

The product of its digits is 648000, while the sum is 42.

The spelling of 51643556322 in words is "fifty-one billion, six hundred forty-three million, five hundred fifty-six thousand, three hundred twenty-two".