71580527011523 has 4 divisors (see below), whose sum is σ = 72289245100848. Its totient is φ = 70871808922200.

The previous prime is 71580527011471. The next prime is 71580527011559. The reversal of 71580527011523 is 32511072508517.

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

It is a cyclic number.

It is not a de Polignac number, because 71580527011523 - 2¹⁴ = 71580526995139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71580527011573) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 354359044511 + ... + 354359044712.

It is an arithmetic number, because the mean of its divisors is an integer number (18072311275212).

Almost surely, 2^{71580527011523} is an apocalyptic number.

71580527011523 is a deficient number, since it is larger than the sum of its proper divisors (708718089325).

71580527011523 is a wasteful number, since it uses less digits than its factorization.

71580527011523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 708718089324.

The product of its (nonzero) digits is 588000, while the sum is 47.

The spelling of 71580527011523 in words is "seventy-one trillion, five hundred eighty billion, five hundred twenty-seven million, eleven thousand, five hundred twenty-three".