161530654 has 4 divisors (see below), whose sum is σ = 242295984. Its totient is φ = 80765326.

The previous prime is 161530631. The next prime is 161530669. The reversal of 161530654 is 456035161.

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, 40382662 + ... + 40382665.

It is an arithmetic number, because the mean of its divisors is an integer number (60573996).

Almost surely, 2^161530654 is an apocalyptic number.

161530654 is a deficient number, since it is larger than the sum of its proper divisors (80765330).

161530654 is an equidigital number, since it uses as much as digits as its factorization.

161530654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80765329.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 161530654 is about 12709.4710354129. The cubic root of 161530654 is about 544.6092128848.

The spelling of 161530654 in words is "one hundred sixty-one million, five hundred thirty thousand, six hundred fifty-four".