51722730652 has 6 divisors (see below), whose sum is σ = 90514778648. Its totient is φ = 25861365324.

The previous prime is 51722730649. The next prime is 51722730659. The reversal of 51722730652 is 25603722715.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51722730659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6465341328 + ... + 6465341335.

Almost surely, 2^51722730652 is an apocalyptic number.

It is an amenable number.

51722730652 is a deficient number, since it is larger than the sum of its proper divisors (38792047996).

51722730652 is a wasteful number, since it uses less digits than its factorization.

51722730652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12930682667 (or 12930682665 counting only the distinct ones).

The product of its (nonzero) digits is 176400, while the sum is 40.

The spelling of 51722730652 in words is "fifty-one billion, seven hundred twenty-two million, seven hundred thirty thousand, six hundred fifty-two".