71449612823 has 4 divisors (see below), whose sum is σ = 71494075920. Its totient is φ = 71405149728.

The previous prime is 71449612813. The next prime is 71449612849. The reversal of 71449612823 is 32821694417.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32821694417 = 43 ⋅763295219.

It is a cyclic number.

It is not a de Polignac number, because 71449612823 - 2³² = 67154645527 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 (71449612813) 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, 22229138 + ... + 22232351.

It is an arithmetic number, because the mean of its divisors is an integer number (17873518980).

Almost surely, 2^71449612823 is an apocalyptic number.

71449612823 is a deficient number, since it is larger than the sum of its proper divisors (44463097).

71449612823 is a wasteful number, since it uses less digits than its factorization.

71449612823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44463096.

The product of its digits is 580608, while the sum is 47.

The spelling of 71449612823 in words is "seventy-one billion, four hundred forty-nine million, six hundred twelve thousand, eight hundred twenty-three".