51721675776 has 297 divisors, whose sum is σ = 157651254579. Its totient is φ = 16330862592.

The previous prime is 51721675757. The next prime is 51721675777. The reversal of 51721675776 is 67757612715.

The square root of 51721675776 is 227424.

It is a perfect power (a square), and thus also a powerful number.

51721675776 is a `hidden beast` number, since 5 + 1 + 7 + 2 + 1 + 67 + 577 + 6 = 666.

It is not an unprimeable number, because it can be changed into a prime (51721675777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 502152141 + ... + 502152243.

Almost surely, 2^51721675776 is an apocalyptic number.

51721675776 is the 227424-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51721675776

51721675776 is an abundant number, since it is smaller than the sum of its proper divisors (105929578803).

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

51721675776 is a wasteful number, since it uses less digits than its factorization.

51721675776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278 (or 131 counting only the distinct ones).

The product of its digits is 4321800, while the sum is 54.

The spelling of 51721675776 in words is "fifty-one billion, seven hundred twenty-one million, six hundred seventy-five thousand, seven hundred seventy-six".