57644578309 has 16 divisors (see below), whose sum is σ = 59755501440. Its totient is φ = 55572454080.

The previous prime is 57644578297. The next prime is 57644578331. The reversal of 57644578309 is 90387544675.

It is a cyclic number.

It is not a de Polignac number, because 57644578309 - 2¹⁹ = 57644054021 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 (57644578379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13228159 + ... + 13232515.

It is an arithmetic number, because the mean of its divisors is an integer number (3734718840).

Almost surely, 2^57644578309 is an apocalyptic number.

57644578309 is a gapful number since it is divisible by the number (59) formed by its first and last digit.

It is an amenable number.

57644578309 is a deficient number, since it is larger than the sum of its proper divisors (2110923131).

57644578309 is a wasteful number, since it uses less digits than its factorization.

57644578309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8700.

The product of its (nonzero) digits is 25401600, while the sum is 58.

The spelling of 57644578309 in words is "fifty-seven billion, six hundred forty-four million, five hundred seventy-eight thousand, three hundred nine".