57185449940 has 24 divisors (see below), whose sum is σ = 120271151112. Its totient is φ = 22839569280.

The previous prime is 57185449931. The next prime is 57185449991. The reversal of 57185449940 is 4994458175.

It can be written as a sum of positive squares in 4 ways, for example, as 13874012944 + 43311436996 = 117788^2 + 208114^2 .

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2149619 + ... + 2176058.

It is an arithmetic number, because the mean of its divisors is an integer number (5011297963).

Almost surely, 2^57185449940 is an apocalyptic number.

It is an amenable number.

57185449940 is an abundant number, since it is smaller than the sum of its proper divisors (63085701172).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

57185449940 is a wasteful number, since it uses less digits than its factorization.

57185449940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4326347 (or 4326345 counting only the distinct ones).

The product of its (nonzero) digits is 7257600, while the sum is 56.

The spelling of 57185449940 in words is "fifty-seven billion, one hundred eighty-five million, four hundred forty-nine thousand, nine hundred forty".