57145536581 has 48 divisors (see below), whose sum is σ = 70263029760. Its totient is φ = 45498831840.

The previous prime is 57145536527. The next prime is 57145536583. The reversal of 57145536581 is 18563554175.

It is not a de Polignac number, because 57145536581 - 2¹⁴ = 57145520197 is a prime.

It is a super-2 number, since 2×57145536581² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57145536583) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 30411800 + ... + 30413678.

It is an arithmetic number, because the mean of its divisors is an integer number (1463813120).

Almost surely, 2^57145536581 is an apocalyptic number.

It is an amenable number.

57145536581 is a deficient number, since it is larger than the sum of its proper divisors (13117493179).

57145536581 is a wasteful number, since it uses less digits than its factorization.

57145536581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2166 (or 2143 counting only the distinct ones).

The product of its digits is 2520000, while the sum is 50.

The spelling of 57145536581 in words is "fifty-seven billion, one hundred forty-five million, five hundred thirty-six thousand, five hundred eighty-one".