71445558987 has 12 divisors (see below), whose sum is σ = 112580880984. Its totient is φ = 43300338720.

The previous prime is 71445558949. The next prime is 71445558991. The reversal of 71445558987 is 78985554417.

71445558987 is a `hidden beast` number, since 7 + 1 + 4 + 45 + 5 + 589 + 8 + 7 = 666.

It is not a de Polignac number, because 71445558987 - 2⁷ = 71445558859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71445558907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 360836058 + ... + 360836255.

It is an arithmetic number, because the mean of its divisors is an integer number (9381740082).

Almost surely, 2^71445558987 is an apocalyptic number.

71445558987 is a deficient number, since it is larger than the sum of its proper divisors (41135321997).

71445558987 is a wasteful number, since it uses less digits than its factorization.

71445558987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 721672330 (or 721672327 counting only the distinct ones).

The product of its digits is 56448000, while the sum is 63.

The spelling of 71445558987 in words is "seventy-one billion, four hundred forty-five million, five hundred fifty-eight thousand, nine hundred eighty-seven".