51009413873 has 4 divisors (see below), whose sum is σ = 55646633328. Its totient is φ = 46372194420.

The previous prime is 51009413843. The next prime is 51009413899. The reversal of 51009413873 is 37831490015.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51009413873 - 2⁸ = 51009413617 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 51009413873.

It is not an unprimeable number, because it can be changed into a prime (51009413843) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2318609711 + ... + 2318609732.

It is an arithmetic number, because the mean of its divisors is an integer number (13911658332).

Almost surely, 2^51009413873 is an apocalyptic number.

It is an amenable number.

51009413873 is a deficient number, since it is larger than the sum of its proper divisors (4637219455).

51009413873 is a wasteful number, since it uses less digits than its factorization.

51009413873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4637219454.

The product of its (nonzero) digits is 90720, while the sum is 41.

The spelling of 51009413873 in words is "fifty-one billion, nine million, four hundred thirteen thousand, eight hundred seventy-three".