71880291985 has 16 divisors (see below), whose sum is σ = 87062976000. Its totient is φ = 56968902720.

The previous prime is 71880291979. The next prime is 71880292049. The reversal of 71880291985 is 58919208817.

It is not a de Polignac number, because 71880291985 - 2¹³ = 71880283793 is a prime.

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 in 15 ways as a sum of consecutive naturals, for example, 87016 + ... + 389014.

It is an arithmetic number, because the mean of its divisors is an integer number (5441436000).

Almost surely, 2^71880291985 is an apocalyptic number.

It is an amenable number.

71880291985 is a deficient number, since it is larger than the sum of its proper divisors (15182684015).

71880291985 is a wasteful number, since it uses less digits than its factorization.

71880291985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302448.

The product of its (nonzero) digits is 2903040, while the sum is 58.

The spelling of 71880291985 in words is "seventy-one billion, eight hundred eighty million, two hundred ninety-one thousand, nine hundred eighty-five".