51363719979913 has 12 divisors (see below), whose sum is σ = 56545720153524. Its totient is φ = 46621444812800.

The previous prime is 51363719979877. The next prime is 51363719979947. The reversal of 51363719979913 is 31997991736315.

It can be written as a sum of positive squares in 2 ways, for example, as 42294900923209 + 9068819056704 = 6503453^2 + 3011448^2 .

It is a de Polignac number, because none of the positive numbers 2^k-51363719979913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51373719979913) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 331040656 + ... + 331195777.

It is an arithmetic number, because the mean of its divisors is an integer number (4712143346127).

Almost surely, 2^{51363719979913} is an apocalyptic number.

It is an amenable number.

51363719979913 is a deficient number, since it is larger than the sum of its proper divisors (5182000173611).

51363719979913 is a wasteful number, since it uses less digits than its factorization.

51363719979913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 662237096 (or 662237085 counting only the distinct ones).

The product of its digits is 260406090, while the sum is 73.

The spelling of 51363719979913 in words is "fifty-one trillion, three hundred sixty-three billion, seven hundred nineteen million, nine hundred seventy-nine thousand, nine hundred thirteen".