71672427617 has 8 divisors (see below), whose sum is σ = 81940737600. Its totient is φ = 61411465584.

The previous prime is 71672427611. The next prime is 71672427637.

71672427617 is nontrivially palindromic in base 10.

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

It is not a de Polignac number, because 71672427617 - 2⁶ = 71672427553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71672427611) 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, 1816067 + ... + 1855112.

It is an arithmetic number, because the mean of its divisors is an integer number (10242592200).

Almost surely, 2^71672427617 is an apocalyptic number.

It is an amenable number.

71672427617 is a deficient number, since it is larger than the sum of its proper divisors (10268309983).

71672427617 is a wasteful number, since it uses less digits than its factorization.

71672427617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3673975.

The product of its digits is 1382976, while the sum is 50.

The spelling of 71672427617 in words is "seventy-one billion, six hundred seventy-two million, four hundred twenty-seven thousand, six hundred seventeen".