57520081663 has 4 divisors (see below), whose sum is σ = 62749180008. Its totient is φ = 52290983320.

The previous prime is 57520081651. The next prime is 57520081681. The reversal of 57520081663 is 36618002575.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57520081663 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57520081603) 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, 2614549156 + ... + 2614549177.

It is an arithmetic number, because the mean of its divisors is an integer number (15687295002).

Almost surely, 2^57520081663 is an apocalyptic number.

57520081663 is a deficient number, since it is larger than the sum of its proper divisors (5229098345).

57520081663 is a wasteful number, since it uses less digits than its factorization.

57520081663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5229098344.

The product of its (nonzero) digits is 302400, while the sum is 43.

The spelling of 57520081663 in words is "fifty-seven billion, five hundred twenty million, eighty-one thousand, six hundred sixty-three".