65728142871 has 4 divisors (see below), whose sum is σ = 87637523832. Its totient is φ = 43818761912.

The previous prime is 65728142849. The next prime is 65728142941. The reversal of 65728142871 is 17824182756.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 65728142871 - 2⁵ = 65728142839 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65728342871) 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 3 ways as a sum of consecutive naturals, for example, 10954690476 + ... + 10954690481.

It is an arithmetic number, because the mean of its divisors is an integer number (21909380958).

Almost surely, 2^65728142871 is an apocalyptic number.

65728142871 is a deficient number, since it is larger than the sum of its proper divisors (21909380961).

65728142871 is a wasteful number, since it uses less digits than its factorization.

65728142871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21909380960.

The product of its digits is 1505280, while the sum is 51.

The spelling of 65728142871 in words is "sixty-five billion, seven hundred twenty-eight million, one hundred forty-two thousand, eight hundred seventy-one".