57645090091 has 2 divisors, whose sum is σ = 57645090092. Its totient is φ = 57645090090.

The previous prime is 57645090089. The next prime is 57645090131. The reversal of 57645090091 is 19009054675.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 57645090091 - 2¹ = 57645090089 is a prime.

Together with 57645090089, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (57645090691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28822545045 + 28822545046.

It is an arithmetic number, because the mean of its divisors is an integer number (28822545046).

Almost surely, 2^57645090091 is an apocalyptic number.

57645090091 is a deficient number, since it is larger than the sum of its proper divisors (1).

57645090091 is an equidigital number, since it uses as much as digits as its factorization.

57645090091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 340200, while the sum is 46.

The spelling of 57645090091 in words is "fifty-seven billion, six hundred forty-five million, ninety thousand, ninety-one".