64256771 has 2 divisors, whose sum is σ = 64256772. Its totient is φ = 64256770.

The previous prime is 64256761. The next prime is 64256807. The reversal of 64256771 is 17765246.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64256771 - 2²² = 60062467 is a prime.

It is a super-3 number, since 3×64256771³ (a number of 24 digits) contains 333 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (64256711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32128385 + 32128386.

It is an arithmetic number, because the mean of its divisors is an integer number (32128386).

Almost surely, 2^64256771 is an apocalyptic number.

64256771 is a deficient number, since it is larger than the sum of its proper divisors (1).

64256771 is an equidigital number, since it uses as much as digits as its factorization.

64256771 is an evil number, because the sum of its binary digits is even.

The product of its digits is 70560, while the sum is 38.

The square root of 64256771 is about 8016.0321231891. The cubic root of 64256771 is about 400.5342257728.

The spelling of 64256771 in words is "sixty-four million, two hundred fifty-six thousand, seven hundred seventy-one".