71857240705 has 16 divisors (see below), whose sum is σ = 87655924224. Its totient is φ = 56542071040.

The previous prime is 71857240691. The next prime is 71857240727. The reversal of 71857240705 is 50704275817.

It is not a de Polignac number, because 71857240705 - 2¹⁷ = 71857109633 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 411409 + ... + 559438.

It is an arithmetic number, because the mean of its divisors is an integer number (5478495264).

Almost surely, 2^71857240705 is an apocalyptic number.

It is an amenable number.

71857240705 is a deficient number, since it is larger than the sum of its proper divisors (15798683519).

71857240705 is a wasteful number, since it uses less digits than its factorization.

71857240705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 971096.

The product of its (nonzero) digits is 548800, while the sum is 46.

The spelling of 71857240705 in words is "seventy-one billion, eight hundred fifty-seven million, two hundred forty thousand, seven hundred five".