64756091 has 2 divisors, whose sum is σ = 64756092. Its totient is φ = 64756090.

The previous prime is 64756073. The next prime is 64756121. The reversal of 64756091 is 19065746.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64756091 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (64756591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32378045 + 32378046.

It is an arithmetic number, because the mean of its divisors is an integer number (32378046).

Almost surely, 2^64756091 is an apocalyptic number.

64756091 is a deficient number, since it is larger than the sum of its proper divisors (1).

64756091 is an equidigital number, since it uses as much as digits as its factorization.

64756091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 64756091 is about 8047.1169371397. The cubic root of 64756091 is about 401.5690269223.

The spelling of 64756091 in words is "sixty-four million, seven hundred fifty-six thousand, ninety-one".