51425643426 has 16 divisors (see below), whose sum is σ = 105359855328. Its totient is φ = 16723786400.

The previous prime is 51425643391. The next prime is 51425643431. The reversal of 51425643426 is 62434652415.

It is a happy 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 7 ways as a sum of consecutive naturals, for example, 104523420 + ... + 104523911.

It is an arithmetic number, because the mean of its divisors is an integer number (6584990958).

Almost surely, 2^51425643426 is an apocalyptic number.

51425643426 is an abundant number, since it is smaller than the sum of its proper divisors (53934211902).

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

51425643426 is a wasteful number, since it uses less digits than its factorization.

51425643426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209047377.

The product of its digits is 691200, while the sum is 42.

The spelling of 51425643426 in words is "fifty-one billion, four hundred twenty-five million, six hundred forty-three thousand, four hundred twenty-six".