161512879 has 8 divisors (see below), whose sum is σ = 176988672. Its totient is φ = 146169240.

The previous prime is 161512853. The next prime is 161512891. The reversal of 161512879 is 978215161.

It is a happy number.

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 161512879 - 2⁷ = 161512751 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 (161012879) 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, 30469 + ... + 35374.

It is an arithmetic number, because the mean of its divisors is an integer number (22123584).

Almost surely, 2^161512879 is an apocalyptic number.

161512879 is a deficient number, since it is larger than the sum of its proper divisors (15475793).

161512879 is a wasteful number, since it uses less digits than its factorization.

161512879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66077.

The product of its digits is 30240, while the sum is 40.

The square root of 161512879 is about 12708.7717345147. The cubic root of 161512879 is about 544.5892356986.

The spelling of 161512879 in words is "one hundred sixty-one million, five hundred twelve thousand, eight hundred seventy-nine".