161279118403 has 8 divisors (see below), whose sum is σ = 173709915008. Its totient is φ = 148851851904.

The previous prime is 161279118401. The next prime is 161279118431. The reversal of 161279118403 is 304811972161.

It is a happy number.

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 161279118403 - 2¹ = 161279118401 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 161279118403.

It is not an unprimeable number, because it can be changed into a prime (161279118401) 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 7 ways as a sum of consecutive naturals, for example, 787251 + ... + 970732.

It is an arithmetic number, because the mean of its divisors is an integer number (21713739376).

Almost surely, 2^161279118403 is an apocalyptic number.

161279118403 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

161279118403 is a deficient number, since it is larger than the sum of its proper divisors (12430796605).

161279118403 is a wasteful number, since it uses less digits than its factorization.

161279118403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1765053.

The product of its (nonzero) digits is 72576, while the sum is 43.

The spelling of 161279118403 in words is "one hundred sixty-one billion, two hundred seventy-nine million, one hundred eighteen thousand, four hundred three".