851642153 has 4 divisors (see below), whose sum is σ = 853609428. Its totient is φ = 849674880.

The previous prime is 851642117. The next prime is 851642177. The reversal of 851642153 is 351246158.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 66129424 + 785512729 = 8132^2 + 28027^2 .

It is a cyclic number.

It is not a de Polignac number, because 851642153 - 2⁸ = 851641897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (851642053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 982988 + ... + 983853.

It is an arithmetic number, because the mean of its divisors is an integer number (213402357).

Almost surely, 2^851642153 is an apocalyptic number.

It is an amenable number.

851642153 is a deficient number, since it is larger than the sum of its proper divisors (1967275).

851642153 is a wasteful number, since it uses less digits than its factorization.

851642153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1967274.

The product of its digits is 28800, while the sum is 35.

The square root of 851642153 is about 29182.9085767680. The cubic root of 851642153 is about 947.8778680485.

The spelling of 851642153 in words is "eight hundred fifty-one million, six hundred forty-two thousand, one hundred fifty-three".