51619771806 has 16 divisors (see below), whose sum is σ = 103304047248. Its totient is φ = 17195840000.

The previous prime is 51619771747. The next prime is 51619771811. The reversal of 51619771806 is 60817791615.

It is a congruent number.

It is an unprimeable number.

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, 2677245 + ... + 2696456.

It is an arithmetic number, because the mean of its divisors is an integer number (6456502953).

Almost surely, 2^51619771806 is an apocalyptic number.

51619771806 is an abundant number, since it is smaller than the sum of its proper divisors (51684275442).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51619771806 is a wasteful number, since it uses less digits than its factorization.

51619771806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5375307.

The product of its (nonzero) digits is 635040, while the sum is 51.

The spelling of 51619771806 in words is "fifty-one billion, six hundred nineteen million, seven hundred seventy-one thousand, eight hundred six".