51855786007 has 16 divisors (see below), whose sum is σ = 52378824960. Its totient is φ = 51336280000.

The previous prime is 51855785953. The next prime is 51855786013. The reversal of 51855786007 is 70068755815.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 51855786007 - 2⁷ = 51855785879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51855786107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53404032 + ... + 53405002.

It is an arithmetic number, because the mean of its divisors is an integer number (3273676560).

Almost surely, 2^51855786007 is an apocalyptic number.

51855786007 is a deficient number, since it is larger than the sum of its proper divisors (523038953).

51855786007 is a wasteful number, since it uses less digits than its factorization.

51855786007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2294.

The product of its (nonzero) digits is 2352000, while the sum is 52.

The spelling of 51855786007 in words is "fifty-one billion, eight hundred fifty-five million, seven hundred eighty-six thousand, seven".