57432779387 has 2 divisors, whose sum is σ = 57432779388. Its totient is φ = 57432779386.

The previous prime is 57432779309. The next prime is 57432779389. The reversal of 57432779387 is 78397723475.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 57432779387 - 2¹⁶ = 57432713851 is a prime.

Together with 57432779389, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (57432779389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28716389693 + 28716389694.

It is an arithmetic number, because the mean of its divisors is an integer number (28716389694).

Almost surely, 2^57432779387 is an apocalyptic number.

57432779387 is a deficient number, since it is larger than the sum of its proper divisors (1).

57432779387 is an equidigital number, since it uses as much as digits as its factorization.

57432779387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62233920, while the sum is 62.

The spelling of 57432779387 in words is "fifty-seven billion, four hundred thirty-two million, seven hundred seventy-nine thousand, three hundred eighty-seven".