71857121583 has 8 divisors (see below), whose sum is σ = 103179456688. Its totient is φ = 44219767104.

The previous prime is 71857121473. The next prime is 71857121587. The reversal of 71857121583 is 38512175817.

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

It is not a de Polignac number, because 71857121583 - 2¹⁸ = 71856859439 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71857121587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 921245110 + ... + 921245187.

It is an arithmetic number, because the mean of its divisors is an integer number (12897432086).

Almost surely, 2^71857121583 is an apocalyptic number.

71857121583 is a deficient number, since it is larger than the sum of its proper divisors (31322335105).

71857121583 is a wasteful number, since it uses less digits than its factorization.

71857121583 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1842490313.

The product of its digits is 470400, while the sum is 48.

The spelling of 71857121583 in words is "seventy-one billion, eight hundred fifty-seven million, one hundred twenty-one thousand, five hundred eighty-three".