71388945877 has 4 divisors (see below), whose sum is σ = 71449911136. Its totient is φ = 71327980620.

The previous prime is 71388945871. The next prime is 71388945883. The reversal of 71388945877 is 77854988317.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (71388945871) and next prime (71388945883).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71388945877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71388945871) 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, 30480873 + ... + 30483214.

It is an arithmetic number, because the mean of its divisors is an integer number (17862477784).

Almost surely, 2^71388945877 is an apocalyptic number.

It is an amenable number.

71388945877 is a deficient number, since it is larger than the sum of its proper divisors (60965259).

71388945877 is a wasteful number, since it uses less digits than its factorization.

71388945877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60965258.

The product of its digits is 94832640, while the sum is 67.

The spelling of 71388945877 in words is "seventy-one billion, three hundred eighty-eight million, nine hundred forty-five thousand, eight hundred seventy-seven".