71215055601 has 4 divisors (see below), whose sum is σ = 94953407472. Its totient is φ = 47476703732.

The previous prime is 71215055467. The next prime is 71215055627. The reversal of 71215055601 is 10655051217.

It is a happy number.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71215055601 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (71215055651) 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, 11869175931 + ... + 11869175936.

It is an arithmetic number, because the mean of its divisors is an integer number (23738351868).

Almost surely, 2^71215055601 is an apocalyptic number.

It is an amenable number.

71215055601 is a deficient number, since it is larger than the sum of its proper divisors (23738351871).

71215055601 is a wasteful number, since it uses less digits than its factorization.

71215055601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23738351870.

The product of its (nonzero) digits is 10500, while the sum is 33.

The spelling of 71215055601 in words is "seventy-one billion, two hundred fifteen million, fifty-five thousand, six hundred one".