64251777715241 has 2 divisors, whose sum is σ = 64251777715242. Its totient is φ = 64251777715240.

The previous prime is 64251777715193. The next prime is 64251777715243. The reversal of 64251777715241 is 14251777715246.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61390280688025 + 2861497027216 = 7835195^2 + 1691596^2 .

It is a cyclic number.

It is not a de Polignac number, because 64251777715241 - 2²² = 64251773520937 is a prime.

Together with 64251777715243, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (64251777715243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32125888857620 + 32125888857621.

It is an arithmetic number, because the mean of its divisors is an integer number (32125888857621).

Almost surely, 2^{64251777715241} is an apocalyptic number.

It is an amenable number.

64251777715241 is a deficient number, since it is larger than the sum of its proper divisors (1).

64251777715241 is an equidigital number, since it uses as much as digits as its factorization.

64251777715241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23049600, while the sum is 59.

The spelling of 64251777715241 in words is "sixty-four trillion, two hundred fifty-one billion, seven hundred seventy-seven million, seven hundred fifteen thousand, two hundred forty-one".