161167851 has 24 divisors (see below), whose sum is σ = 251487600. Its totient is φ = 98870976.

The previous prime is 161167849. The next prime is 161167907. The reversal of 161167851 is 158761161.

It is not a de Polignac number, because 161167851 - 2¹ = 161167849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161167151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38860 + ... + 42806.

It is an arithmetic number, because the mean of its divisors is an integer number (10478650).

Almost surely, 2^161167851 is an apocalyptic number.

161167851 is a deficient number, since it is larger than the sum of its proper divisors (90319749).

161167851 is a wasteful number, since it uses less digits than its factorization.

161167851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4315 (or 4312 counting only the distinct ones).

The product of its digits is 10080, while the sum is 36.

The square root of 161167851 is about 12695.1900734097. The cubic root of 161167851 is about 544.2011706871.

The spelling of 161167851 in words is "one hundred sixty-one million, one hundred sixty-seven thousand, eight hundred fifty-one".