161454643 has 16 divisors (see below), whose sum is σ = 189987840. Its totient is φ = 134307936.

The previous prime is 161454619. The next prime is 161454649. The reversal of 161454643 is 346454161.

It is a de Polignac number, because none of the positive numbers 2^k-161454643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 161454599 and 161454608.

It is not an unprimeable number, because it can be changed into a prime (161454649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 192018 + ... + 192856.

It is an arithmetic number, because the mean of its divisors is an integer number (11874240).

Almost surely, 2^161454643 is an apocalyptic number.

161454643 is a deficient number, since it is larger than the sum of its proper divisors (28533197).

161454643 is an equidigital number, since it uses as much as digits as its factorization.

161454643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1626.

The product of its digits is 34560, while the sum is 34.

The square root of 161454643 is about 12706.4803545278. The cubic root of 161454643 is about 544.5237744354.

The spelling of 161454643 in words is "one hundred sixty-one million, four hundred fifty-four thousand, six hundred forty-three".