51604636322 has 30 divisors (see below), whose sum is σ = 80593428279. Its totient is φ = 24782150680.

The previous prime is 51604636319. The next prime is 51604636357. The reversal of 51604636322 is 22363640615.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 28315129441 + 23289506881 = 168271^2 + 152609^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=160631.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 270181247 + ... + 270181437.

Almost surely, 2^51604636322 is an apocalyptic number.

51604636322 is a deficient number, since it is larger than the sum of its proper divisors (28988791957).

51604636322 is an frugal number, since it uses more digits than its factorization.

51604636322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500 (or 222 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 38.

The spelling of 51604636322 in words is "fifty-one billion, six hundred four million, six hundred thirty-six thousand, three hundred twenty-two".