71198678209 has 8 divisors (see below), whose sum is σ = 71900221952. Its totient is φ = 70497332640.

The previous prime is 71198678191. The next prime is 71198678227. The reversal of 71198678209 is 90287689117.

It is an interprime number because it is at equal distance from previous prime (71198678191) and next prime (71198678227).

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 71198678209 - 2¹¹ = 71198676161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71198675209) 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, 733072 + ... + 824494.

It is an arithmetic number, because the mean of its divisors is an integer number (8987527744).

Almost surely, 2^71198678209 is an apocalyptic number.

It is an amenable number.

71198678209 is a deficient number, since it is larger than the sum of its proper divisors (701543743).

71198678209 is a wasteful number, since it uses less digits than its factorization.

71198678209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99087.

The product of its (nonzero) digits is 3048192, while the sum is 58.

The spelling of 71198678209 in words is "seventy-one billion, one hundred ninety-eight million, six hundred seventy-eight thousand, two hundred nine".