71571521006 has 16 divisors (see below), whose sum is σ = 108667818000. Its totient is φ = 35349050688.

The previous prime is 71571520991. The next prime is 71571521027. The reversal of 71571521006 is 60012517517.

It is a super-2 number, since 2×71571521006² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1149770 + ... + 1210418.

It is an arithmetic number, because the mean of its divisors is an integer number (6791738625).

Almost surely, 2^71571521006 is an apocalyptic number.

71571521006 is a deficient number, since it is larger than the sum of its proper divisors (37096296994).

71571521006 is a wasteful number, since it uses less digits than its factorization.

71571521006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67843.

The product of its (nonzero) digits is 14700, while the sum is 35.

The spelling of 71571521006 in words is "seventy-one billion, five hundred seventy-one million, five hundred twenty-one thousand, six".