161361526 has 4 divisors (see below), whose sum is σ = 242042292. Its totient is φ = 80680762.

The previous prime is 161361511. The next prime is 161361553. The reversal of 161361526 is 625163161.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40340380 + ... + 40340383.

It is an arithmetic number, because the mean of its divisors is an integer number (60510573).

Almost surely, 2^161361526 is an apocalyptic number.

161361526 is a deficient number, since it is larger than the sum of its proper divisors (80680766).

161361526 is an equidigital number, since it uses as much as digits as its factorization.

161361526 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80680765.

The product of its digits is 6480, while the sum is 31.

The square root of 161361526 is about 12702.8156721256. The cubic root of 161361526 is about 544.4190718180.

The spelling of 161361526 in words is "one hundred sixty-one million, three hundred sixty-one thousand, five hundred twenty-six".