71545679999 has 12 divisors (see below), whose sum is σ = 74093104008. Its totient is φ = 69080450400.

The previous prime is 71545679983. The next prime is 71545680007. The reversal of 71545679999 is 99997654517.

It is not a de Polignac number, because 71545679999 - 2⁴ = 71545679983 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 (71545679299) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20132 + ... + 378809.

It is an arithmetic number, because the mean of its divisors is an integer number (6174425334).

Almost surely, 2^71545679999 is an apocalyptic number.

71545679999 is a deficient number, since it is larger than the sum of its proper divisors (2547424009).

71545679999 is a wasteful number, since it uses less digits than its factorization.

71545679999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399146 (or 399109 counting only the distinct ones).

The product of its digits is 192893400, while the sum is 71.

The spelling of 71545679999 in words is "seventy-one billion, five hundred forty-five million, six hundred seventy-nine thousand, nine hundred ninety-nine".