51949481715369 has 128 divisors (see below), whose sum is σ = 92929254912000. Its totient is φ = 28055022395904.

The previous prime is 51949481715367. The next prime is 51949481715377. The reversal of 51949481715369 is 96351718494915.

51949481715369 is a `hidden beast` number, since 5 + 1 + 9 + 4 + 9 + 4 + 81 + 7 + 1 + 536 + 9 = 666.

It is not a de Polignac number, because 51949481715369 - 2¹ = 51949481715367 is a prime.

It is a super-2 number, since 2×51949481715369² (a number of 28 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 51949481715297 and 51949481715306.

It is not an unprimeable number, because it can be changed into a prime (51949481715367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 75002574 + ... + 75692040.

It is an arithmetic number, because the mean of its divisors is an integer number (726009804000).

Almost surely, 2^{51949481715369} is an apocalyptic number.

51949481715369 is a gapful number since it is divisible by the number (59) formed by its first and last digit.

It is an amenable number.

51949481715369 is a deficient number, since it is larger than the sum of its proper divisors (40979773196631).

51949481715369 is a wasteful number, since it uses less digits than its factorization.

51949481715369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 689804 (or 689798 counting only the distinct ones).

The product of its digits is 293932800, while the sum is 72.

The spelling of 51949481715369 in words is "fifty-one trillion, nine hundred forty-nine billion, four hundred eighty-one million, seven hundred fifteen thousand, three hundred sixty-nine".