51885086377 has 4 divisors (see below), whose sum is σ = 52029613440. Its totient is φ = 51740559316.

The previous prime is 51885086327. The next prime is 51885086389. The reversal of 51885086377 is 77368058815.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51885086377 is a prime.

It is a super-2 number, since 2×51885086377² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51885086327) 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, 72262993 + ... + 72263710.

It is an arithmetic number, because the mean of its divisors is an integer number (13007403360).

Almost surely, 2^51885086377 is an apocalyptic number.

It is an amenable number.

51885086377 is a deficient number, since it is larger than the sum of its proper divisors (144527063).

51885086377 is a wasteful number, since it uses less digits than its factorization.

51885086377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144527062.

The product of its (nonzero) digits is 11289600, while the sum is 58.

The spelling of 51885086377 in words is "fifty-one billion, eight hundred eighty-five million, eighty-six thousand, three hundred seventy-seven".