71532557015 has 4 divisors (see below), whose sum is σ = 85839068424. Its totient is φ = 57226045608.

The previous prime is 71532557003. The next prime is 71532557051. The reversal of 71532557015 is 51075523517.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51075523517 = 165541 ⋅308537.

It is a cyclic number.

It is not a de Polignac number, because 71532557015 - 2⁸ = 71532556759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 7153255697 + ... + 7153255706.

It is an arithmetic number, because the mean of its divisors is an integer number (21459767106).

Almost surely, 2^71532557015 is an apocalyptic number.

71532557015 is a deficient number, since it is larger than the sum of its proper divisors (14306511409).

71532557015 is a wasteful number, since it uses less digits than its factorization.

71532557015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14306511408.

The product of its (nonzero) digits is 183750, while the sum is 41.

The spelling of 71532557015 in words is "seventy-one billion, five hundred thirty-two million, five hundred fifty-seven thousand, fifteen".