51245089056 has 144 divisors (see below), whose sum is σ = 169945776000. Its totient is φ = 14641425792.

The previous prime is 51245089043. The next prime is 51245089067. The reversal of 51245089056 is 65098054215.

51245089056 is a `hidden beast` number, since 5 + 1 + 2 + 4 + 508 + 90 + 56 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-2 number, since 2×51245089056² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 160596 + ... + 358163.

It is an arithmetic number, because the mean of its divisors is an integer number (1180179000).

Almost surely, 2^51245089056 is an apocalyptic number.

51245089056 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

51245089056 is an abundant number, since it is smaller than the sum of its proper divisors (118700686944).

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

51245089056 is a wasteful number, since it uses less digits than its factorization.

51245089056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518796 (or 518771 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 45.

The spelling of 51245089056 in words is "fifty-one billion, two hundred forty-five million, eighty-nine thousand, fifty-six".