57685020581 has 8 divisors (see below), whose sum is σ = 58209575064. Its totient is φ = 57162792960.

The previous prime is 57685020527. The next prime is 57685020583. The reversal of 57685020581 is 18502058675.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 7944869956 + 49740150625 = 89134^2 + 223025^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 57685020581 - 2²⁶ = 57617911717 is a prime.

It is a super-2 number, since 2×57685020581² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57685020583) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 531890 + ... + 631091.

It is an arithmetic number, because the mean of its divisors is an integer number (7276196883).

Almost surely, 2^57685020581 is an apocalyptic number.

It is an amenable number.

57685020581 is a deficient number, since it is larger than the sum of its proper divisors (524554483).

57685020581 is a wasteful number, since it uses less digits than its factorization.

57685020581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1163431.

The product of its (nonzero) digits is 672000, while the sum is 47.

The spelling of 57685020581 in words is "fifty-seven billion, six hundred eighty-five million, twenty thousand, five hundred eighty-one".