851445155 has 16 divisors (see below), whose sum is σ = 1141807968. Its totient is φ = 604128000.

The previous prime is 851445139. The next prime is 851445167. The reversal of 851445155 is 551544158.

It is not a de Polignac number, because 851445155 - 2⁴ = 851445139 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 186536 + ... + 191045.

It is an arithmetic number, because the mean of its divisors is an integer number (71362998).

Almost surely, 2^851445155 is an apocalyptic number.

851445155 is a deficient number, since it is larger than the sum of its proper divisors (290362813).

851445155 is a wasteful number, since it uses less digits than its factorization.

851445155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377638.

The product of its digits is 80000, while the sum is 38.

The square root of 851445155 is about 29179.5331525369. The cubic root of 851445155 is about 947.8047761428.

The spelling of 851445155 in words is "eight hundred fifty-one million, four hundred forty-five thousand, one hundred fifty-five".