51051555056 has 20 divisors (see below), whose sum is σ = 99634380432. Its totient is φ = 25339456896.

The previous prime is 51051555013. The next prime is 51051555073. The reversal of 51051555056 is 65055515015.

It is a happy number.

It is a super-2 number, since 2×51051555056² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11642780 + ... + 11647163.

Almost surely, 2^51051555056 is an apocalyptic number.

It is an amenable number.

51051555056 is a deficient number, since it is larger than the sum of its proper divisors (48582825376).

51051555056 is a wasteful number, since it uses less digits than its factorization.

51051555056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23290088 (or 23290082 counting only the distinct ones).

The product of its (nonzero) digits is 93750, while the sum is 38.

The spelling of 51051555056 in words is "fifty-one billion, fifty-one million, five hundred fifty-five thousand, fifty-six".