161129160851 has 4 divisors (see below), whose sum is σ = 161178605400. Its totient is φ = 161079716304.

The previous prime is 161129160677. The next prime is 161129160887. The reversal of 161129160851 is 158061921161.

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

It is a cyclic number.

It is not a de Polignac number, because 161129160851 - 2²² = 161124966547 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 161129160799 and 161129160808.

It is not an unprimeable number, because it can be changed into a prime (161129160551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24717386 + ... + 24723903.

It is an arithmetic number, because the mean of its divisors is an integer number (40294651350).

Almost surely, 2^161129160851 is an apocalyptic number.

161129160851 is a deficient number, since it is larger than the sum of its proper divisors (49444549).

161129160851 is an equidigital number, since it uses as much as digits as its factorization.

161129160851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49444548.

The product of its (nonzero) digits is 25920, while the sum is 41.

The spelling of 161129160851 in words is "one hundred sixty-one billion, one hundred twenty-nine million, one hundred sixty thousand, eight hundred fifty-one".