64180090 has 16 divisors (see below), whose sum is σ = 124410888. Its totient is φ = 23697216.

The previous prime is 64180073. The next prime is 64180091. The reversal of 64180090 is 9008146.

It can be written as a sum of positive squares in 4 ways, for example, as 23590449 + 40589641 = 4857^2 + 6371^2 .

It is not an unprimeable number, because it can be changed into a prime (64180091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 246717 + ... + 246976.

Almost surely, 2^64180090 is an apocalyptic number.

64180090 is a deficient number, since it is larger than the sum of its proper divisors (60230798).

64180090 is a wasteful number, since it uses less digits than its factorization.

64180090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493713.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 64180090 is about 8011.2477180524. The cubic root of 64180090 is about 400.3748361350.

The spelling of 64180090 in words is "sixty-four million, one hundred eighty thousand, ninety".