64493500 has 24 divisors (see below), whose sum is σ = 140854896. Its totient is φ = 25797200.

The previous prime is 64493497. The next prime is 64493503. The reversal of 64493500 is 539446.

It is an interprime number because it is at equal distance from previous prime (64493497) and next prime (64493503).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64493503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63994 + ... + 64993.

It is an arithmetic number, because the mean of its divisors is an integer number (5868954).

Almost surely, 2^64493500 is an apocalyptic number.

It is an amenable number.

64493500 is an abundant number, since it is smaller than the sum of its proper divisors (76361396).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64493500 is a wasteful number, since it uses less digits than its factorization.

64493500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129006 (or 128994 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 64493500 is about 8030.7845195846. The cubic root of 64493500 is about 401.0254936601.

The spelling of 64493500 in words is "sixty-four million, four hundred ninety-three thousand, five hundred".