64620189 has 12 divisors (see below), whose sum is σ = 94214016. Its totient is φ = 42676872.

The previous prime is 64620187. The next prime is 64620203. The reversal of 64620189 is 98102646.

64620189 is a `hidden beast` number, since 646 + 2 + 0 + 1 + 8 + 9 = 666.

It is not a de Polignac number, because 64620189 - 2¹ = 64620187 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64620181) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32589 + ... + 34514.

It is an arithmetic number, because the mean of its divisors is an integer number (7851168).

Almost surely, 2^64620189 is an apocalyptic number.

It is an amenable number.

64620189 is a deficient number, since it is larger than the sum of its proper divisors (29593827).

64620189 is a wasteful number, since it uses less digits than its factorization.

64620189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67216 (or 67213 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 64620189 is about 8038.6683598716. The cubic root of 64620189 is about 401.2879091909.

The spelling of 64620189 in words is "sixty-four million, six hundred twenty thousand, one hundred eighty-nine".