51887013399 has 16 divisors (see below), whose sum is σ = 82782700000. Its totient is φ = 31930469568.

The previous prime is 51887013391. The next prime is 51887013421. The reversal of 51887013399 is 99331078815.

51887013399 is a `hidden beast` number, since 5 + 188 + 70 + 1 + 3 + 399 = 666.

It is not a de Polignac number, because 51887013399 - 2³ = 51887013391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51887013391) 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, 73912774 + ... + 73913475.

It is an arithmetic number, because the mean of its divisors is an integer number (5173918750).

Almost surely, 2^51887013399 is an apocalyptic number.

51887013399 is a deficient number, since it is larger than the sum of its proper divisors (30895686601).

51887013399 is a wasteful number, since it uses less digits than its factorization.

51887013399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147826271 (or 147826265 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 54.

The spelling of 51887013399 in words is "fifty-one billion, eight hundred eighty-seven million, thirteen thousand, three hundred ninety-nine".