51853766142 has 16 divisors (see below), whose sum is σ = 103709828880.
Its totient is φ = 17284205952.
The previous prime is 51853766131. The next prime is 51853766207. The reversal of 51853766142 is 24166735815.
It is a junction number, because it is equal to n+sod(n) for n = 51853766091 and 51853766100.
It is a congruent number.
It is an unprimeable number.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 378868 + ... + 497240.
It is an arithmetic number, because the mean of its divisors is an integer number (6481864305).
Almost surely, 251853766142 is an apocalyptic number.
51853766142 is an abundant number, since it is smaller than the sum of its proper divisors (51856062738).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
51853766142 is a wasteful number, since it uses less digits than its factorization.
51853766142 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 191387.
The product of its digits is 1209600, while the sum is 48.
The spelling of 51853766142 in words is "fifty-one billion, eight hundred fifty-three million, seven hundred sixty-six thousand, one hundred forty-two".