71857332031 has 8 divisors (see below), whose sum is σ = 73178756784. Its totient is φ = 70543228800.

The previous prime is 71857332023. The next prime is 71857332047. The reversal of 71857332031 is 13023375817.

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 71857332031 - 2³ = 71857332023 is a prime.

It is a super-2 number, since 2×71857332031² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71857332931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1810570 + ... + 1849831.

It is an arithmetic number, because the mean of its divisors is an integer number (9147344598).

Almost surely, 2^71857332031 is an apocalyptic number.

71857332031 is a deficient number, since it is larger than the sum of its proper divisors (1321424753).

71857332031 is a wasteful number, since it uses less digits than its factorization.

71857332031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3660761.

The product of its (nonzero) digits is 105840, while the sum is 40.

The spelling of 71857332031 in words is "seventy-one billion, eight hundred fifty-seven million, three hundred thirty-two thousand, thirty-one".