51986585567 has 16 divisors (see below), whose sum is σ = 62032369152. Its totient is φ = 42597830880.

The previous prime is 51986585537. The next prime is 51986585579. The reversal of 51986585567 is 76558568915.

It is a cyclic number.

It is not a de Polignac number, because 51986585567 - 2¹⁰ = 51986584543 is a prime.

It is a super-2 number, since 2×51986585567² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51986585537) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 187568 + ... + 373034.

It is an arithmetic number, because the mean of its divisors is an integer number (3877023072).

Almost surely, 2^51986585567 is an apocalyptic number.

51986585567 is a deficient number, since it is larger than the sum of its proper divisors (10045783585).

51986585567 is a wasteful number, since it uses less digits than its factorization.

51986585567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187238.

The product of its digits is 90720000, while the sum is 65.

The spelling of 51986585567 in words is "fifty-one billion, nine hundred eighty-six million, five hundred eighty-five thousand, five hundred sixty-seven".