64544502102401 has 4 divisors (see below), whose sum is σ = 64547481880404. Its totient is φ = 64541522324400.

The previous prime is 64544502102397. The next prime is 64544502102403. The reversal of 64544502102401 is 10420120544546.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9676927322176 + 54867574780225 = 3110776^2 + 7407265^2 .

It is a cyclic number.

It is not a de Polignac number, because 64544502102401 - 2² = 64544502102397 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64544502102403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1489856510 + ... + 1489899831.

It is an arithmetic number, because the mean of its divisors is an integer number (16136870470101).

Almost surely, 2^{64544502102401} is an apocalyptic number.

It is an amenable number.

64544502102401 is a deficient number, since it is larger than the sum of its proper divisors (2979778003).

64544502102401 is a wasteful number, since it uses less digits than its factorization.

64544502102401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2979778002.

The product of its (nonzero) digits is 153600, while the sum is 38.

Adding to 64544502102401 its reverse (10420120544546), we get a palindrome (74964622646947).

The spelling of 64544502102401 in words is "sixty-four trillion, five hundred forty-four billion, five hundred two million, one hundred two thousand, four hundred one".