51855505167 has 8 divisors (see below), whose sum is σ = 69188068480. Its totient is φ = 34546639320.

The previous prime is 51855505157. The next prime is 51855505211. The reversal of 51855505167 is 76150555815.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51855505167 - 2¹⁰ = 51855504143 is a prime.

It is a super-2 number, since 2×51855505167² (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 (51855505157) 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 7 ways as a sum of consecutive naturals, for example, 5919259 + ... + 5928012.

It is an arithmetic number, because the mean of its divisors is an integer number (8648508560).

Almost surely, 2^51855505167 is an apocalyptic number.

51855505167 is a deficient number, since it is larger than the sum of its proper divisors (17332563313).

51855505167 is a wasteful number, since it uses less digits than its factorization.

51855505167 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11848733.

The product of its (nonzero) digits is 1050000, while the sum is 48.

The spelling of 51855505167 in words is "fifty-one billion, eight hundred fifty-five million, five hundred five thousand, one hundred sixty-seven".