51317463939 has 16 divisors (see below), whose sum is σ = 78378650112. Its totient is φ = 29256536448.

The previous prime is 51317463893. The next prime is 51317463947. The reversal of 51317463939 is 93936471315.

It is not a de Polignac number, because 51317463939 - 2¹³ = 51317455747 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51317463891 and 51317463900.

It is not an unprimeable number, because it can be changed into a prime (51317463959) 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 15 ways as a sum of consecutive naturals, for example, 2812719 + ... + 2830904.

It is an arithmetic number, because the mean of its divisors is an integer number (4898665632).

Almost surely, 2^51317463939 is an apocalyptic number.

51317463939 is a deficient number, since it is larger than the sum of its proper divisors (27061186173).

51317463939 is a wasteful number, since it uses less digits than its factorization.

51317463939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5644066.

The product of its digits is 1837080, while the sum is 51.

The spelling of 51317463939 in words is "fifty-one billion, three hundred seventeen million, four hundred sixty-three thousand, nine hundred thirty-nine".