71540742571 has 8 divisors (see below), whose sum is σ = 73547133440. Its totient is φ = 69538186368.

The previous prime is 71540742563. The next prime is 71540742577. The reversal of 71540742571 is 17524704517.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 71540742571 - 2³ = 71540742563 is a prime.

It is a super-2 number, since 2×71540742571² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71540742577) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 920811 + ... + 995476.

It is an arithmetic number, because the mean of its divisors is an integer number (9193391680).

Almost surely, 2^71540742571 is an apocalyptic number.

71540742571 is a deficient number, since it is larger than the sum of its proper divisors (2006390869).

71540742571 is a wasteful number, since it uses less digits than its factorization.

71540742571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1917333.

The product of its (nonzero) digits is 274400, while the sum is 43.

The spelling of 71540742571 in words is "seventy-one billion, five hundred forty million, seven hundred forty-two thousand, five hundred seventy-one".