71522575565 has 16 divisors (see below), whose sum is σ = 98233022592. Its totient is φ = 48971592384.

The previous prime is 71522575499. The next prime is 71522575589. The reversal of 71522575565 is 56557522517.

It is a cyclic number.

It is not a de Polignac number, because 71522575565 - 2¹⁴ = 71522559181 is a prime.

It is a super-2 number, since 2×71522575565² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1485539 + ... + 1532928.

It is an arithmetic number, because the mean of its divisors is an integer number (6139563912).

Almost surely, 2^71522575565 is an apocalyptic number.

It is an amenable number.

71522575565 is a deficient number, since it is larger than the sum of its proper divisors (26710447027).

71522575565 is a wasteful number, since it uses less digits than its factorization.

71522575565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3019156.

The product of its digits is 3675000, while the sum is 50.

The spelling of 71522575565 in words is "seventy-one billion, five hundred twenty-two million, five hundred seventy-five thousand, five hundred sixty-five".