64854238637565 has 96 divisors (see below), whose sum is σ = 124993524225024. Its totient is φ = 30891602396160.

The previous prime is 64854238637519. The next prime is 64854238637579. The reversal of 64854238637565 is 56573683245846.

64854238637565 is a `hidden beast` number, since 6 + 4 + 8 + 5 + 4 + 23 + 8 + 6 + 37 + 565 = 666.

It is not a de Polignac number, because 64854238637565 - 2¹⁰ = 64854238636541 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 64854238637493 and 64854238637502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 83815689 + ... + 84585921.

It is an arithmetic number, because the mean of its divisors is an integer number (1302015877344).

Almost surely, 2^{64854238637565} is an apocalyptic number.

64854238637565 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

64854238637565 is a deficient number, since it is larger than the sum of its proper divisors (60139285587459).

64854238637565 is a wasteful number, since it uses less digits than its factorization.

64854238637565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 774931 (or 774928 counting only the distinct ones).

The product of its digits is 3483648000, while the sum is 72.

The spelling of 64854238637565 in words is "sixty-four trillion, eight hundred fifty-four billion, two hundred thirty-eight million, six hundred thirty-seven thousand, five hundred sixty-five".