71618161 has 8 divisors (see below), whose sum is σ = 76792320. Its totient is φ = 66550848.

The previous prime is 71618149. The next prime is 71618171. The reversal of 71618161 is 16181617.

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 71618161 - 2⁹ = 71617649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71618101) 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, 25321 + ... + 28006.

It is an arithmetic number, because the mean of its divisors is an integer number (9599040).

Almost surely, 2^71618161 is an apocalyptic number.

It is an amenable number.

71618161 is a deficient number, since it is larger than the sum of its proper divisors (5174159).

71618161 is a wasteful number, since it uses less digits than its factorization.

71618161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53423.

The product of its digits is 2016, while the sum is 31.

The square root of 71618161 is about 8462.7513847448. The cubic root of 71618161 is about 415.2800374393.

Adding to 71618161 its reverse (16181617), we get a palindrome (87799778).

The spelling of 71618161 in words is "seventy-one million, six hundred eighteen thousand, one hundred sixty-one".