64925997482889 has 27 divisors (see below), whose sum is σ = 95086864042677. Its totient is φ = 42689906534016.

The previous prime is 64925997482881. The next prime is 64925997483013. The reversal of 64925997482889 is 98828479952946.

The square root of 64925997482889 is 8057667.

It is a perfect power (a square), and thus also a powerful number.

64925997482889 is a `hidden beast` number, since 6 + 4 + 9 + 2 + 599 + 7 + 4 + 8 + 2 + 8 + 8 + 9 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 12732886212489 + 52193111270400 = 3568317^2 + 7224480^2 .

It is not a de Polignac number, because 64925997482889 - 2³ = 64925997482881 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 64925997482799 and 64925997482808.

It is not an unprimeable number, because it can be changed into a prime (64925997482881) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1764610677 + ... + 1764647469.

Almost surely, 2^{64925997482889} is an apocalyptic number.

64925997482889 is the 8057667-th square number.

64925997482889 is the 4028834-th centered octagonal number.

It is an amenable number.

64925997482889 is a deficient number, since it is larger than the sum of its proper divisors (30160866559788).

64925997482889 is an frugal number, since it uses more digits than its factorization.

64925997482889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73738 (or 36869 counting only the distinct ones).

The product of its digits is 45148078080, while the sum is 90.

The spelling of 64925997482889 in words is "sixty-four trillion, nine hundred twenty-five billion, nine hundred ninety-seven million, four hundred eighty-two thousand, eight hundred eighty-nine".