71623373305 has 24 divisors (see below), whose sum is σ = 94752422856. Its totient is φ = 51935009280.

The previous prime is 71623373299. The next prime is 71623373309. The reversal of 71623373305 is 50337332617.

It can be written as a sum of positive squares in 4 ways, for example, as 13886972649 + 57736400656 = 117843^2 + 240284^2 .

It is not a de Polignac number, because 71623373305 - 2⁷ = 71623373177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71623373309) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28239 + ... + 379531.

It is an arithmetic number, because the mean of its divisors is an integer number (3948017619).

Almost surely, 2^71623373305 is an apocalyptic number.

It is an amenable number.

71623373305 is a deficient number, since it is larger than the sum of its proper divisors (23129049551).

71623373305 is a wasteful number, since it uses less digits than its factorization.

71623373305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351657 (or 351646 counting only the distinct ones).

The product of its (nonzero) digits is 238140, while the sum is 40.

The spelling of 71623373305 in words is "seventy-one billion, six hundred twenty-three million, three hundred seventy-three thousand, three hundred five".