64775590 has 32 divisors (see below), whose sum is σ = 132731136. Its totient is φ = 22529760.

The previous prime is 64775551. The next prime is 64775591. The reversal of 64775590 is 9557746.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64775591) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10272 + ... + 15331.

It is an arithmetic number, because the mean of its divisors is an integer number (4147848).

Almost surely, 2^64775590 is an apocalyptic number.

64775590 is an abundant number, since it is smaller than the sum of its proper divisors (67955546).

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

64775590 is a wasteful number, since it uses less digits than its factorization.

64775590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25644.

The product of its (nonzero) digits is 264600, while the sum is 43.

The square root of 64775590 is about 8048.3283978724. The cubic root of 64775590 is about 401.6093289672.

The spelling of 64775590 in words is "sixty-four million, seven hundred seventy-five thousand, five hundred ninety".