71209265004 has 36 divisors (see below), whose sum is σ = 180023227384. Its totient is φ = 23733516672.

The previous prime is 71209264999. The next prime is 71209265041. The reversal of 71209265004 is 40056290217.

71209265004 is a `hidden beast` number, since 7 + 120 + 9 + 26 + 500 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 71209265004.

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 11 ways as a sum of consecutive naturals, for example, 188004 + ... + 421620.

Almost surely, 2^71209265004 is an apocalyptic number.

It is an amenable number.

71209265004 is an abundant number, since it is smaller than the sum of its proper divisors (108813962380).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71209265004 is a wasteful number, since it uses less digits than its factorization.

71209265004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242094 (or 242089 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The spelling of 71209265004 in words is "seventy-one billion, two hundred nine million, two hundred sixty-five thousand, four".