51935169249 has 10 divisors (see below), whose sum is σ = 77582166530. Its totient is φ = 34623446112.

The previous prime is 51935169239. The next prime is 51935169257. The reversal of 51935169249 is 94296153915.

51935169249 is a `hidden beast` number, since 519 + 35 + 1 + 6 + 92 + 4 + 9 = 666.

51935169249 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 33867777024 + 18067392225 = 184032^2 + 134415^2 .

It is not a de Polignac number, because 51935169249 - 2⁹ = 51935168737 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51935169195 and 51935169204.

It is not an unprimeable number, because it can be changed into a prime (51935169239) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 320587384 + ... + 320587545.

It is an arithmetic number, because the mean of its divisors is an integer number (7758216653).

Almost surely, 2^51935169249 is an apocalyptic number.

It is an amenable number.

51935169249 is a deficient number, since it is larger than the sum of its proper divisors (25646997281).

51935169249 is an equidigital number, since it uses as much as digits as its factorization.

51935169249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 641174941 (or 641174932 counting only the distinct ones).

The product of its digits is 2624400, while the sum is 54.

The spelling of 51935169249 in words is "fifty-one billion, nine hundred thirty-five million, one hundred sixty-nine thousand, two hundred forty-nine".