161892651 has 8 divisors (see below), whose sum is σ = 216359424. Its totient is φ = 107677160.

The previous prime is 161892629. The next prime is 161892667. The reversal of 161892651 is 156298161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 161892651 - 2²¹ = 159795499 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161892671) 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 7 ways as a sum of consecutive naturals, for example, 61311 + ... + 63896.

It is an arithmetic number, because the mean of its divisors is an integer number (27044928).

Almost surely, 2^161892651 is an apocalyptic number.

161892651 is a deficient number, since it is larger than the sum of its proper divisors (54466773).

161892651 is a wasteful number, since it uses less digits than its factorization.

161892651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125641.

The product of its digits is 25920, while the sum is 39.

The square root of 161892651 is about 12723.7042955265. The cubic root of 161892651 is about 545.0157400835.

The spelling of 161892651 in words is "one hundred sixty-one million, eight hundred ninety-two thousand, six hundred fifty-one".