71839099172 has 6 divisors (see below), whose sum is σ = 125718423558. Its totient is φ = 35919549584.

The previous prime is 71839099169. The next prime is 71839099183. The reversal of 71839099172 is 27199093817.

It can be written as a sum of positive squares in only one way, i.e., 71832576256 + 6522916 = 268016^2 + 2554^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8979887393 + ... + 8979887400.

It is an arithmetic number, because the mean of its divisors is an integer number (20953070593).

Almost surely, 2^71839099172 is an apocalyptic number.

It is an amenable number.

71839099172 is a deficient number, since it is larger than the sum of its proper divisors (53879324386).

71839099172 is a wasteful number, since it uses less digits than its factorization.

71839099172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17959774797 (or 17959774795 counting only the distinct ones).

The product of its (nonzero) digits is 1714608, while the sum is 56.

The spelling of 71839099172 in words is "seventy-one billion, eight hundred thirty-nine million, ninety-nine thousand, one hundred seventy-two".