51158778402425 has 12 divisors (see below), whose sum is σ = 67168466703036. Its totient is φ = 38519550796800.

The previous prime is 51158778402409. The next prime is 51158778402439. The reversal of 51158778402425 is 52420487785115.

51158778402425 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 937064656441 + 50221713745984 = 968021^2 + 7086728^2 .

It is not a de Polignac number, because 51158778402425 - 2⁴ = 51158778402409 is a prime.

It is a Duffinian 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 11 ways as a sum of consecutive naturals, for example, 60186797696 + ... + 60186798545.

It is an arithmetic number, because the mean of its divisors is an integer number (5597372225253).

Almost surely, 2^{51158778402425} is an apocalyptic number.

It is an amenable number.

51158778402425 is a deficient number, since it is larger than the sum of its proper divisors (16009688300611).

51158778402425 is a wasteful number, since it uses less digits than its factorization.

51158778402425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120373596268 (or 120373596263 counting only the distinct ones).

The product of its (nonzero) digits is 25088000, while the sum is 59.

The spelling of 51158778402425 in words is "fifty-one trillion, one hundred fifty-eight billion, seven hundred seventy-eight million, four hundred two thousand, four hundred twenty-five".