161538074 has 8 divisors (see below), whose sum is σ = 242728788. Its totient is φ = 80628480.

The previous prime is 161538067. The next prime is 161538079. The reversal of 161538074 is 470835161.

It can be written as a sum of positive squares in 2 ways, for example, as 161467849 + 70225 = 12707^2 + 265^2 .

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 (161538079) 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, 68837 + ... + 71144.

Almost surely, 2^161538074 is an apocalyptic number.

161538074 is a deficient number, since it is larger than the sum of its proper divisors (81190714).

161538074 is a wasteful number, since it uses less digits than its factorization.

161538074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140560.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 161538074 is about 12709.7629403542. The cubic root of 161538074 is about 544.6175517324.

The spelling of 161538074 in words is "one hundred sixty-one million, five hundred thirty-eight thousand, seventy-four".