64138408601 has 8 divisors (see below), whose sum is σ = 65030881800. Its totient is φ = 63246310272.

The previous prime is 64138408597. The next prime is 64138408637. The reversal of 64138408601 is 10680483146.

It can be written as a sum of positive squares in 4 ways, for example, as 22898952976 + 41239455625 = 151324^2 + 203075^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64138408601 - 2² = 64138408597 is a prime.

It is a super-2 number, since 2×64138408601² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64138408651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 260075 + ... + 442623.

It is an arithmetic number, because the mean of its divisors is an integer number (8128860225).

Almost surely, 2^64138408601 is an apocalyptic number.

It is an amenable number.

64138408601 is a deficient number, since it is larger than the sum of its proper divisors (892473199).

64138408601 is a wasteful number, since it uses less digits than its factorization.

64138408601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187435.

The product of its (nonzero) digits is 110592, while the sum is 41.

The spelling of 64138408601 in words is "sixty-four billion, one hundred thirty-eight million, four hundred eight thousand, six hundred one".