851139242037 has 60 divisors (see below), whose sum is σ = 1480767140160. Its totient is φ = 485797135824.

The previous prime is 851139241999. The next prime is 851139242111. The reversal of 851139242037 is 730242931158.

It is a happy number.

851139242037 is a `hidden beast` number, since 8 + 51 + 1 + 392 + 4 + 203 + 7 = 666.

It is not a de Polignac number, because 851139242037 - 2²² = 851135047733 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 851139241983 and 851139242001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (851139292037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 3284548 + ... + 3534194.

It is an arithmetic number, because the mean of its divisors is an integer number (24679452336).

Almost surely, 2^851139242037 is an apocalyptic number.

It is an amenable number.

851139242037 is a deficient number, since it is larger than the sum of its proper divisors (629627898123).

851139242037 is a wasteful number, since it uses less digits than its factorization.

851139242037 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250532 (or 250516 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The spelling of 851139242037 in words is "eight hundred fifty-one billion, one hundred thirty-nine million, two hundred forty-two thousand, thirty-seven".