161118898 has 8 divisors (see below), whose sum is σ = 254398320. Its totient is φ = 76319460.

The previous prime is 161118871. The next prime is 161118899. The reversal of 161118898 is 898811161.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (161118899) 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, 2119948 + ... + 2120023.

It is an arithmetic number, because the mean of its divisors is an integer number (31799790).

Almost surely, 2^161118898 is an apocalyptic number.

161118898 is a deficient number, since it is larger than the sum of its proper divisors (93279422).

161118898 is a wasteful number, since it uses less digits than its factorization.

161118898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4239992.

The product of its digits is 27648, while the sum is 43.

The square root of 161118898 is about 12693.2619133145. The cubic root of 161118898 is about 544.1460666917.

It can be divided in two parts, 161 and 118898, that multiplied together give a triangular number (19142578 = T₆₁₈₇).

The spelling of 161118898 in words is "one hundred sixty-one million, one hundred eighteen thousand, eight hundred ninety-eight".