851154440042 has 32 divisors (see below), whose sum is σ = 1288860249600. Its totient is φ = 421556474880.

The previous prime is 851154440041. The next prime is 851154440053. The reversal of 851154440042 is 240044451158.

It is a junction number, because it is equal to n+sod(n) for n = 851154439978 and 851154440005.

It is not an unprimeable number, because it can be changed into a prime (851154440041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 166923209 + ... + 166928307.

It is an arithmetic number, because the mean of its divisors is an integer number (40276882800).

Almost surely, 2^851154440042 is an apocalyptic number.

851154440042 is a deficient number, since it is larger than the sum of its proper divisors (437705809558).

851154440042 is a wasteful number, since it uses less digits than its factorization.

851154440042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7118.

The product of its (nonzero) digits is 102400, while the sum is 38.

The spelling of 851154440042 in words is "eight hundred fifty-one billion, one hundred fifty-four million, four hundred forty thousand, forty-two".