57156644787 has 32 divisors (see below), whose sum is σ = 85215062016. Its totient is φ = 33775507200.

The previous prime is 57156644777. The next prime is 57156644791. The reversal of 57156644787 is 78744665175.

It is not a de Polignac number, because 57156644787 - 2¹² = 57156640691 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 57156644787.

It is not an unprimeable number, because it can be changed into a prime (57156644717) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2454933 + ... + 2478105.

It is an arithmetic number, because the mean of its divisors is an integer number (2662970688).

Almost surely, 2^57156644787 is an apocalyptic number.

57156644787 is a deficient number, since it is larger than the sum of its proper divisors (28058417229).

57156644787 is a wasteful number, since it uses less digits than its factorization.

57156644787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25051.

The product of its digits is 39513600, while the sum is 60.

The spelling of 57156644787 in words is "fifty-seven billion, one hundred fifty-six million, six hundred forty-four thousand, seven hundred eighty-seven".