64536029378 has 6 divisors (see below), whose sum is σ = 96804582969. Its totient is φ = 32267835056.

The previous prime is 64536029351. The next prime is 64536029387. The reversal of 64536029378 is 87392063546.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 60198094609 + 4337934769 = 245353^2 + 65863^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=179633.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 269450 + ... + 449082.

Almost surely, 2^64536029378 is an apocalyptic number.

64536029378 is a deficient number, since it is larger than the sum of its proper divisors (32268553591).

64536029378 is an frugal number, since it uses more digits than its factorization.

64536029378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359268 (or 179635 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 53.

The spelling of 64536029378 in words is "sixty-four billion, five hundred thirty-six million, twenty-nine thousand, three hundred seventy-eight".