71897488479817 has 32 divisors (see below), whose sum is σ = 101614411422720. Its totient is φ = 48992662624320.

The previous prime is 71897488479769. The next prime is 71897488479827.

71897488479817 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 71897488479817 - 2¹⁹ = 71897487955529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71897488479827) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1890130003 + ... + 1890168040.

It is an arithmetic number, because the mean of its divisors is an integer number (3175450356960).

Almost surely, 2^{71897488479817} is an apocalyptic number.

71897488479817 is a gapful number since it is divisible by the number (77) formed by its first and last digit.

It is an amenable number.

71897488479817 is a deficient number, since it is larger than the sum of its proper divisors (29716922942903).

71897488479817 is a wasteful number, since it uses less digits than its factorization.

71897488479817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3780298093.

The product of its digits is 12745506816, while the sum is 88.

The spelling of 71897488479817 in words is "seventy-one trillion, eight hundred ninety-seven billion, four hundred eighty-eight million, four hundred seventy-nine thousand, eight hundred seventeen".