161070538 has 4 divisors (see below), whose sum is σ = 241605810. Its totient is φ = 80535268.

The previous prime is 161070527. The next prime is 161070571. The reversal of 161070538 is 835070161.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 141205689 + 19864849 = 11883^2 + 4457^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40267633 + ... + 40267636.

Almost surely, 2^161070538 is an apocalyptic number.

161070538 is a deficient number, since it is larger than the sum of its proper divisors (80535272).

161070538 is an equidigital number, since it uses as much as digits as its factorization.

161070538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80535271.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 161070538 is about 12691.3568226569. The cubic root of 161070538 is about 544.0916192466.

The spelling of 161070538 in words is "one hundred sixty-one million, seventy thousand, five hundred thirty-eight".