57645491 has 2 divisors, whose sum is σ = 57645492. Its totient is φ = 57645490.

The previous prime is 57645473. The next prime is 57645493. The reversal of 57645491 is 19454675.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 57645491 - 2²² = 53451187 is a prime.

It is a Sophie Germain prime.

Together with 57645493, 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 (57645493) 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 as a sum of consecutive naturals, namely, 28822745 + 28822746.

It is an arithmetic number, because the mean of its divisors is an integer number (28822746).

Almost surely, 2^57645491 is an apocalyptic number.

57645491 is a deficient number, since it is larger than the sum of its proper divisors (1).

57645491 is an equidigital number, since it uses as much as digits as its factorization.

57645491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 151200, while the sum is 41.

The square root of 57645491 is about 7592.4627756743. The cubic root of 57645491 is about 386.2973962499.

The spelling of 57645491 in words is "fifty-seven million, six hundred forty-five thousand, four hundred ninety-one".