71647223723 has 4 divisors (see below), whose sum is σ = 71651312880. Its totient is φ = 71643134568.

The previous prime is 71647223699. The next prime is 71647223737. The reversal of 71647223723 is 32732274617.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 71647223723 - 2¹⁴ = 71647207339 is a prime.

It is a super-2 number, since 2×71647223723² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71647223773) 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, 2018183 + ... + 2053376.

It is an arithmetic number, because the mean of its divisors is an integer number (17912828220).

Almost surely, 2^71647223723 is an apocalyptic number.

71647223723 is a deficient number, since it is larger than the sum of its proper divisors (4089157).

71647223723 is a wasteful number, since it uses less digits than its factorization.

71647223723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4089156.

The product of its digits is 592704, while the sum is 44.

The spelling of 71647223723 in words is "seventy-one billion, six hundred forty-seven million, two hundred twenty-three thousand, seven hundred twenty-three".