180161494 has 4 divisors (see below), whose sum is σ = 270242244. Its totient is φ = 90080746.

The previous prime is 180161489. The next prime is 180161497. The reversal of 180161494 is 494161081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 494161081 = 9199 ⋅53719.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (180161497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45040372 + ... + 45040375.

It is an arithmetic number, because the mean of its divisors is an integer number (67560561).

Almost surely, 2^180161494 is an apocalyptic number.

180161494 is a deficient number, since it is larger than the sum of its proper divisors (90080750).

180161494 is an equidigital number, since it uses as much as digits as its factorization.

180161494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90080749.

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 180161494 is about 13422.4250416979. The cubic root of 180161494 is about 564.7904242686.

The spelling of 180161494 in words is "one hundred eighty million, one hundred sixty-one thousand, four hundred ninety-four".