71623121579 has 2 divisors, whose sum is σ = 71623121580. Its totient is φ = 71623121578.

The previous prime is 71623121569. The next prime is 71623121597. The reversal of 71623121579 is 97512132617.

Together with next prime (71623121597) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71623121579 - 2¹² = 71623117483 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (71623121569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35811560789 + 35811560790.

It is an arithmetic number, because the mean of its divisors is an integer number (35811560790).

Almost surely, 2^71623121579 is an apocalyptic number.

71623121579 is a deficient number, since it is larger than the sum of its proper divisors (1).

71623121579 is an equidigital number, since it uses as much as digits as its factorization.

71623121579 is an evil number, because the sum of its binary digits is even.

The product of its digits is 158760, while the sum is 44.

The spelling of 71623121579 in words is "seventy-one billion, six hundred twenty-three million, one hundred twenty-one thousand, five hundred seventy-nine".