51005426194 has 4 divisors (see below), whose sum is σ = 76508139294. Its totient is φ = 25502713096.

The previous prime is 51005426177. The next prime is 51005426207. The reversal of 51005426194 is 49162450015.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 50957193169 + 48233025 = 225737^2 + 6945^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12751356547 + ... + 12751356550.

Almost surely, 2^51005426194 is an apocalyptic number.

51005426194 is a deficient number, since it is larger than the sum of its proper divisors (25502713100).

51005426194 is a wasteful number, since it uses less digits than its factorization.

51005426194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25502713099.

The product of its (nonzero) digits is 43200, while the sum is 37.

The spelling of 51005426194 in words is "fifty-one billion, five million, four hundred twenty-six thousand, one hundred ninety-four".