57147785661 has 8 divisors (see below), whose sum is σ = 76288965280. Its totient is φ = 38052564912.

The previous prime is 57147785609. The next prime is 57147785677. The reversal of 57147785661 is 16658774175.

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

It is not a de Polignac number, because 57147785661 - 2¹⁹ = 57147261373 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 (57147780661) 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 7 ways as a sum of consecutive naturals, for example, 11486815 + ... + 11491788.

It is an arithmetic number, because the mean of its divisors is an integer number (9536120660).

Almost surely, 2^57147785661 is an apocalyptic number.

It is an amenable number.

57147785661 is a deficient number, since it is larger than the sum of its proper divisors (19141179619).

57147785661 is a wasteful number, since it uses less digits than its factorization.

57147785661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22979435.

The product of its digits is 9878400, while the sum is 57.

The spelling of 57147785661 in words is "fifty-seven billion, one hundred forty-seven million, seven hundred eighty-five thousand, six hundred sixty-one".