64755571 has 2 divisors, whose sum is σ = 64755572. Its totient is φ = 64755570.

The previous prime is 64755569. The next prime is 64755623. The reversal of 64755571 is 17555746.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64755571 - 2¹ = 64755569 is a prime.

Together with 64755569, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (64755541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32377785 + 32377786.

It is an arithmetic number, because the mean of its divisors is an integer number (32377786).

Almost surely, 2^64755571 is an apocalyptic number.

64755571 is a deficient number, since it is larger than the sum of its proper divisors (1).

64755571 is an equidigital number, since it uses as much as digits as its factorization.

64755571 is an evil number, because the sum of its binary digits is even.

The product of its digits is 147000, while the sum is 40.

The square root of 64755571 is about 8047.0846273666. The cubic root of 64755571 is about 401.5679520353.

The spelling of 64755571 in words is "sixty-four million, seven hundred fifty-five thousand, five hundred seventy-one".