51773912438 has 4 divisors (see below), whose sum is σ = 77660868660. Its totient is φ = 25886956218.

The previous prime is 51773912429. The next prime is 51773912461. The reversal of 51773912438 is 83421937715.

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

It is a super-2 number, since 2×51773912438² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12943478108 + ... + 12943478111.

It is an arithmetic number, because the mean of its divisors is an integer number (19415217165).

Almost surely, 2^51773912438 is an apocalyptic number.

51773912438 is a deficient number, since it is larger than the sum of its proper divisors (25886956222).

51773912438 is a wasteful number, since it uses less digits than its factorization.

51773912438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25886956221.

The product of its digits is 1270080, while the sum is 50.

The spelling of 51773912438 in words is "fifty-one billion, seven hundred seventy-three million, nine hundred twelve thousand, four hundred thirty-eight".