51887378522205 has 12 divisors (see below), whose sum is σ = 89938122771900. Its totient is φ = 27673268545152.

The previous prime is 51887378522201. The next prime is 51887378522227. The reversal of 51887378522205 is 50222587378815.

51887378522205 is a `hidden beast` number, since 5 + 1 + 8 + 8 + 7 + 378 + 52 + 2 + 205 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 37624164893316 + 14263213628889 = 6133854^2 + 3776667^2 .

It is not a de Polignac number, because 51887378522205 - 2² = 51887378522201 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51887378522201) 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, 576526427980 + ... + 576526428069.

It is an arithmetic number, because the mean of its divisors is an integer number (7494843564325).

Almost surely, 2^{51887378522205} is an apocalyptic number.

It is an amenable number.

51887378522205 is a deficient number, since it is larger than the sum of its proper divisors (38050744249695).

51887378522205 is a wasteful number, since it uses less digits than its factorization.

51887378522205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1153052856060 (or 1153052856057 counting only the distinct ones).

The product of its (nonzero) digits is 75264000, while the sum is 63.

The spelling of 51887378522205 in words is "fifty-one trillion, eight hundred eighty-seven billion, three hundred seventy-eight million, five hundred twenty-two thousand, two hundred five".