51371022578 has 18 divisors (see below), whose sum is σ = 77682259629. Its totient is φ = 25478606592.

The previous prime is 51371022553. The next prime is 51371022601. The reversal of 51371022578 is 87522017315.

It can be written as a sum of positive squares in 2 ways, for example, as 46598561689 + 4772460889 = 215867^2 + 69083^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=160267.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 44553650 + ... + 44554802.

Almost surely, 2^51371022578 is an apocalyptic number.

51371022578 is a deficient number, since it is larger than the sum of its proper divisors (26311237051).

51371022578 is an frugal number, since it uses more digits than its factorization.

51371022578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2586 (or 1294 counting only the distinct ones).

The product of its (nonzero) digits is 117600, while the sum is 41.

The spelling of 51371022578 in words is "fifty-one billion, three hundred seventy-one million, twenty-two thousand, five hundred seventy-eight".