57721724863 has 4 divisors (see below), whose sum is σ = 62969154408. Its totient is φ = 52474295320.

The previous prime is 57721724849. The next prime is 57721724869. The reversal of 57721724863 is 36842712775.

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 57721724863 - 2⁹ = 57721724351 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 57721724863.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57721724869) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2623714756 + ... + 2623714777.

It is an arithmetic number, because the mean of its divisors is an integer number (15742288602).

Almost surely, 2^57721724863 is an apocalyptic number.

57721724863 is a deficient number, since it is larger than the sum of its proper divisors (5247429545).

57721724863 is a wasteful number, since it uses less digits than its factorization.

57721724863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5247429544.

The product of its digits is 3951360, while the sum is 52.

The spelling of 57721724863 in words is "fifty-seven billion, seven hundred twenty-one million, seven hundred twenty-four thousand, eight hundred sixty-three".