873168820057 has 4 divisors (see below), whose sum is σ = 873421989300. Its totient is φ = 872915650816.

The previous prime is 873168819923. The next prime is 873168820087. The reversal of 873168820057 is 750028861378.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 750028861378 = 2 ⋅375014430689.

It can be written as a sum of positive squares in 2 ways, for example, as 396107855641 + 477060964416 = 629371^2 + 690696^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-873168820057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (873168820087) 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, 126579448 + ... + 126586345.

It is an arithmetic number, because the mean of its divisors is an integer number (218355497325).

Almost surely, 2^873168820057 is an apocalyptic number.

It is an amenable number.

873168820057 is a deficient number, since it is larger than the sum of its proper divisors (253169243).

873168820057 is a wasteful number, since it uses less digits than its factorization.

873168820057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253169242.

The product of its (nonzero) digits is 4515840, while the sum is 55.

The spelling of 873168820057 in words is "eight hundred seventy-three billion, one hundred sixty-eight million, eight hundred twenty thousand, fifty-seven".