161118454 has 16 divisors (see below), whose sum is σ = 280094976. Its totient is φ = 68077800.

The previous prime is 161118431. The next prime is 161118457. The reversal of 161118454 is 454811161.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161118457) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80052 + ... + 82039.

It is an arithmetic number, because the mean of its divisors is an integer number (17505936).

Almost surely, 2^161118454 is an apocalyptic number.

161118454 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

161118454 is a deficient number, since it is larger than the sum of its proper divisors (118976522).

161118454 is a wasteful number, since it uses less digits than its factorization.

161118454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162171.

The product of its digits is 3840, while the sum is 31.

The square root of 161118454 is about 12693.2444237082. The cubic root of 161118454 is about 544.1455668515.

The spelling of 161118454 in words is "one hundred sixty-one million, one hundred eighteen thousand, four hundred fifty-four".