57147561787 has 2 divisors, whose sum is σ = 57147561788. Its totient is φ = 57147561786.

The previous prime is 57147561781. The next prime is 57147561833. The reversal of 57147561787 is 78716574175.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57147561787 is a prime.

It is not a weakly prime, because it can be changed into another prime (57147561781) 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 as a sum of consecutive naturals, namely, 28573780893 + 28573780894.

It is an arithmetic number, because the mean of its divisors is an integer number (28573780894).

Almost surely, 2^57147561787 is an apocalyptic number.

57147561787 is a deficient number, since it is larger than the sum of its proper divisors (1).

57147561787 is an equidigital number, since it uses as much as digits as its factorization.

57147561787 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11524800, while the sum is 58.

The spelling of 57147561787 in words is "fifty-seven billion, one hundred forty-seven million, five hundred sixty-one thousand, seven hundred eighty-seven".