71263618653 has 4 divisors (see below), whose sum is σ = 95018158208. Its totient is φ = 47509079100.

The previous prime is 71263618619. The next prime is 71263618691. The reversal of 71263618653 is 35681636217.

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, and also an emirpimes, since its reverse is a distinct semiprime: 35681636217 = 3 ⋅11893878739.

It is not a de Polignac number, because 71263618653 - 2¹⁰ = 71263617629 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 (71263618693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11877269773 + ... + 11877269778.

It is an arithmetic number, because the mean of its divisors is an integer number (23754539552).

Almost surely, 2^71263618653 is an apocalyptic number.

It is an amenable number.

71263618653 is a deficient number, since it is larger than the sum of its proper divisors (23754539555).

71263618653 is a wasteful number, since it uses less digits than its factorization.

71263618653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23754539554.

The product of its digits is 1088640, while the sum is 48.

The spelling of 71263618653 in words is "seventy-one billion, two hundred sixty-three million, six hundred eighteen thousand, six hundred fifty-three".