57432779309 has 2 divisors, whose sum is σ = 57432779310. Its totient is φ = 57432779308.

The previous prime is 57432779291. The next prime is 57432779387. The reversal of 57432779309 is 90397723475.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33222352900 + 24210426409 = 182270^2 + 155597^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57432779309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57432779389) 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, 28716389654 + 28716389655.

It is an arithmetic number, because the mean of its divisors is an integer number (28716389655).

Almost surely, 2^57432779309 is an apocalyptic number.

It is an amenable number.

57432779309 is a deficient number, since it is larger than the sum of its proper divisors (1).

57432779309 is an equidigital number, since it uses as much as digits as its factorization.

57432779309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10001880, while the sum is 56.

The spelling of 57432779309 in words is "fifty-seven billion, four hundred thirty-two million, seven hundred seventy-nine thousand, three hundred nine".