57783620521 has 16 divisors (see below), whose sum is σ = 65843664768. Its totient is φ = 50196009600.

The previous prime is 57783620519. The next prime is 57783620533. The reversal of 57783620521 is 12502638775.

It is not a de Polignac number, because 57783620521 - 2¹ = 57783620519 is a prime.

It is a super-2 number, since 2×57783620521² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57789620521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 137701 + ... + 366781.

It is an arithmetic number, because the mean of its divisors is an integer number (4115229048).

Almost surely, 2^57783620521 is an apocalyptic number.

It is an amenable number.

57783620521 is a deficient number, since it is larger than the sum of its proper divisors (8060044247).

57783620521 is a wasteful number, since it uses less digits than its factorization.

57783620521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230112.

The product of its (nonzero) digits is 705600, while the sum is 46.

The spelling of 57783620521 in words is "fifty-seven billion, seven hundred eighty-three million, six hundred twenty thousand, five hundred twenty-one".