64338735121 has 4 divisors (see below), whose sum is σ = 66077619892. Its totient is φ = 62599850352.

The previous prime is 64338735103. The next prime is 64338735137. The reversal of 64338735121 is 12153783346.

64338735121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 29390302096 + 34948433025 = 171436^2 + 186945^2 .

It is a cyclic number.

It is not a de Polignac number, because 64338735121 - 2¹³ = 64338726929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64338735101) 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, 869442330 + ... + 869442403.

It is an arithmetic number, because the mean of its divisors is an integer number (16519404973).

Almost surely, 2^64338735121 is an apocalyptic number.

It is an amenable number.

64338735121 is a deficient number, since it is larger than the sum of its proper divisors (1738884771).

64338735121 is a wasteful number, since it uses less digits than its factorization.

64338735121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1738884770.

The product of its digits is 362880, while the sum is 43.

The spelling of 64338735121 in words is "sixty-four billion, three hundred thirty-eight million, seven hundred thirty-five thousand, one hundred twenty-one".