71588240645 has 4 divisors (see below), whose sum is σ = 85905888780. Its totient is φ = 57270592512.

The previous prime is 71588240629. The next prime is 71588240657. The reversal of 71588240645 is 54604288517.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 25283226049 + 46305014596 = 159007^2 + 215186^2 .

It is a cyclic number.

It is not a de Polignac number, because 71588240645 - 2⁴ = 71588240629 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 71588240593 and 71588240602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7158824060 + ... + 7158824069.

It is an arithmetic number, because the mean of its divisors is an integer number (21476472195).

Almost surely, 2^71588240645 is an apocalyptic number.

It is an amenable number.

71588240645 is a deficient number, since it is larger than the sum of its proper divisors (14317648135).

71588240645 is a wasteful number, since it uses less digits than its factorization.

71588240645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14317648134.

The product of its (nonzero) digits is 2150400, while the sum is 50.

The spelling of 71588240645 in words is "seventy-one billion, five hundred eighty-eight million, two hundred forty thousand, six hundred forty-five".