71887198479 has 4 divisors (see below), whose sum is σ = 95849597976. Its totient is φ = 47924798984.

The previous prime is 71887198451. The next prime is 71887198507. The reversal of 71887198479 is 97489178817.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (71887198451) and next prime (71887198507).

It is a cyclic number.

It is not a de Polignac number, because 71887198479 - 2⁷ = 71887198351 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71887198979) 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, 11981199744 + ... + 11981199749.

It is an arithmetic number, because the mean of its divisors is an integer number (23962399494).

Almost surely, 2^71887198479 is an apocalyptic number.

71887198479 is a deficient number, since it is larger than the sum of its proper divisors (23962399497).

71887198479 is a wasteful number, since it uses less digits than its factorization.

71887198479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23962399496.

The product of its digits is 56899584, while the sum is 69.

The spelling of 71887198479 in words is "seventy-one billion, eight hundred eighty-seven million, one hundred ninety-eight thousand, four hundred seventy-nine".