161840479 has 8 divisors (see below), whose sum is σ = 166381328. Its totient is φ = 157308480.

The previous prime is 161840477. The next prime is 161840507. The reversal of 161840479 is 974048161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 161840479 - 2¹ = 161840477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161840473) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55219 + ... + 58075.

It is an arithmetic number, because the mean of its divisors is an integer number (20797666).

Almost surely, 2^161840479 is an apocalyptic number.

161840479 is a deficient number, since it is larger than the sum of its proper divisors (4540849).

161840479 is a wasteful number, since it uses less digits than its factorization.

161840479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4425.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 161840479 is about 12721.6539412138. The cubic root of 161840479 is about 544.9571876703.

The spelling of 161840479 in words is "one hundred sixty-one million, eight hundred forty thousand, four hundred seventy-nine".