64399935675 has 18 divisors (see below), whose sum is σ = 106478194012. Its totient is φ = 34345460240.

The previous prime is 64399935641. The next prime is 64399935697. The reversal of 64399935675 is 57653999346.

It is not a de Polignac number, because 64399935675 - 2¹⁹ = 64399411387 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2183074 + ... + 2212376.

Almost surely, 2^64399935675 is an apocalyptic number.

64399935675 is a deficient number, since it is larger than the sum of its proper divisors (42078258337).

64399935675 is an frugal number, since it uses more digits than its factorization.

64399935675 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58619 (or 29311 counting only the distinct ones).

The product of its digits is 165337200, while the sum is 66.

The spelling of 64399935675 in words is "sixty-four billion, three hundred ninety-nine million, nine hundred thirty-five thousand, six hundred seventy-five".