167561617 has 4 divisors (see below), whose sum is σ = 167689216. Its totient is φ = 167434020.

The previous prime is 167561591. The next prime is 167561651. The reversal of 167561617 is 716165761.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 716165761 = 443 ⋅1616627.

It is a cyclic number.

It is not a de Polignac number, because 167561617 - 2¹⁹ = 167037329 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 167561617.

It is not an unprimeable number, because it can be changed into a prime (167561657) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61809 + ... + 64462.

It is an arithmetic number, because the mean of its divisors is an integer number (41922304).

Almost surely, 2^167561617 is an apocalyptic number.

It is an amenable number.

167561617 is a deficient number, since it is larger than the sum of its proper divisors (127599).

167561617 is a wasteful number, since it uses less digits than its factorization.

167561617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127598.

The product of its digits is 52920, while the sum is 40.

The square root of 167561617 is about 12944.5593590512. The cubic root of 167561617 is about 551.3044705988.

The spelling of 167561617 in words is "one hundred sixty-seven million, five hundred sixty-one thousand, six hundred seventeen".