71520573412 has 24 divisors (see below), whose sum is σ = 126568322496. Its totient is φ = 35360424288.

The previous prime is 71520573347. The next prime is 71520573479. The reversal of 71520573412 is 21437502517.

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, 149968 + ... + 406855.

It is an arithmetic number, because the mean of its divisors is an integer number (5273680104).

Almost surely, 2^71520573412 is an apocalyptic number.

It is an amenable number.

71520573412 is a deficient number, since it is larger than the sum of its proper divisors (55047749084).

71520573412 is a wasteful number, since it uses less digits than its factorization.

71520573412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557187 (or 557185 counting only the distinct ones).

The product of its (nonzero) digits is 58800, while the sum is 37.

The spelling of 71520573412 in words is "seventy-one billion, five hundred twenty million, five hundred seventy-three thousand, four hundred twelve".