64908025605 has 24 divisors (see below), whose sum is σ = 112514327640. Its totient is φ = 34615434240.

The previous prime is 64908025603. The next prime is 64908025639. The reversal of 64908025605 is 50652080946.

64908025605 is a `hidden beast` number, since 6 + 4 + 9 + 0 + 80 + 2 + 560 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 30639351681 + 34268673924 = 175041^2 + 185118^2 .

It is not a de Polignac number, because 64908025605 - 2¹ = 64908025603 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64908025603) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 888301 + ... + 958589.

It is an arithmetic number, because the mean of its divisors is an integer number (4688096985).

Almost surely, 2^64908025605 is an apocalyptic number.

It is an amenable number.

64908025605 is a deficient number, since it is larger than the sum of its proper divisors (47606302035).

64908025605 is a wasteful number, since it uses less digits than its factorization.

64908025605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90821 (or 90818 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 45.

The spelling of 64908025605 in words is "sixty-four billion, nine hundred eight million, twenty-five thousand, six hundred five".