64331244277 has 2 divisors, whose sum is σ = 64331244278. Its totient is φ = 64331244276.

The previous prime is 64331244253. The next prime is 64331244281. The reversal of 64331244277 is 77244213346.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58158627921 + 6172616356 = 241161^2 + 78566^2 .

It is a cyclic number.

It is not a de Polignac number, because 64331244277 - 2²³ = 64322855669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64331244247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32165622138 + 32165622139.

It is an arithmetic number, because the mean of its divisors is an integer number (32165622139).

Almost surely, 2^64331244277 is an apocalyptic number.

It is an amenable number.

64331244277 is a deficient number, since it is larger than the sum of its proper divisors (1).

64331244277 is an equidigital number, since it uses as much as digits as its factorization.

64331244277 is an evil number, because the sum of its binary digits is even.

The product of its digits is 677376, while the sum is 43.

The spelling of 64331244277 in words is "sixty-four billion, three hundred thirty-one million, two hundred forty-four thousand, two hundred seventy-seven".