71320771612 has 24 divisors (see below), whose sum is σ = 128849857920. Its totient is φ = 34506746880.

The previous prime is 71320771607. The next prime is 71320771649. The reversal of 71320771612 is 21617702317.

It is a happy number.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

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, 1716588 + ... + 1757644.

It is an arithmetic number, because the mean of its divisors is an integer number (5368744080).

Almost surely, 2^71320771612 is an apocalyptic number.

It is an amenable number.

71320771612 is a deficient number, since it is larger than the sum of its proper divisors (57529086308).

71320771612 is a wasteful number, since it uses less digits than its factorization.

71320771612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55101 (or 55099 counting only the distinct ones).

The product of its (nonzero) digits is 24696, while the sum is 37.

The spelling of 71320771612 in words is "seventy-one billion, three hundred twenty million, seven hundred seventy-one thousand, six hundred twelve".