51887267587 has 4 divisors (see below), whose sum is σ = 54939459816. Its totient is φ = 48835075360.

The previous prime is 51887267569. The next prime is 51887267629. The reversal of 51887267587 is 78576278815.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51887267587 - 2²³ = 51878878979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51887267557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1526096089 + ... + 1526096122.

It is an arithmetic number, because the mean of its divisors is an integer number (13734864954).

Almost surely, 2^51887267587 is an apocalyptic number.

51887267587 is a deficient number, since it is larger than the sum of its proper divisors (3052192229).

51887267587 is a wasteful number, since it uses less digits than its factorization.

51887267587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3052192228.

The product of its digits is 52684800, while the sum is 64.

The spelling of 51887267587 in words is "fifty-one billion, eight hundred eighty-seven million, two hundred sixty-seven thousand, five hundred eighty-seven".