64538865927 has 24 divisors (see below), whose sum is σ = 97318821600. Its totient is φ = 41137090368.

The previous prime is 64538865863. The next prime is 64538865947. The reversal of 64538865927 is 72956883546.

It is a happy number.

64538865927 is a `hidden beast` number, since 6 + 4 + 5 + 38 + 8 + 6 + 592 + 7 = 666.

It is not a de Polignac number, because 64538865927 - 2⁶ = 64538865863 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64538865947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 410449 + ... + 545477.

It is an arithmetic number, because the mean of its divisors is an integer number (4054950900).

Almost surely, 2^64538865927 is an apocalyptic number.

64538865927 is a deficient number, since it is larger than the sum of its proper divisors (32779955673).

64538865927 is a wasteful number, since it uses less digits than its factorization.

64538865927 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137367 (or 137364 counting only the distinct ones).

The product of its digits is 87091200, while the sum is 63.

The spelling of 64538865927 in words is "sixty-four billion, five hundred thirty-eight million, eight hundred sixty-five thousand, nine hundred twenty-seven".