161146643 has 6 divisors (see below), whose sum is σ = 187456356. Its totient is φ = 138125652.

The previous prime is 161146607. The next prime is 161146651. The reversal of 161146643 is 346641161.

It is not a de Polignac number, because 161146643 - 2¹² = 161142547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161146603) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1644305 + ... + 1644402.

It is an arithmetic number, because the mean of its divisors is an integer number (31242726).

Almost surely, 2^161146643 is an apocalyptic number.

161146643 is a deficient number, since it is larger than the sum of its proper divisors (26309713).

161146643 is an equidigital number, since it uses as much as digits as its factorization.

161146643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3288721 (or 3288714 counting only the distinct ones).

The product of its digits is 10368, while the sum is 32.

The square root of 161146643 is about 12694.3547689514. The cubic root of 161146643 is about 544.1772992499.

The spelling of 161146643 in words is "one hundred sixty-one million, one hundred forty-six thousand, six hundred forty-three".