64680590 has 32 divisors (see below), whose sum is σ = 125737920. Its totient is φ = 23814144.

The previous prime is 64680589. The next prime is 64680593. The reversal of 64680590 is 9508646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64680593) 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, 83726 + ... + 84494.

It is an arithmetic number, because the mean of its divisors is an integer number (3929310).

Almost surely, 2^64680590 is an apocalyptic number.

64680590 is a deficient number, since it is larger than the sum of its proper divisors (61057330).

64680590 is a wasteful number, since it uses less digits than its factorization.

64680590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1436.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 64680590 is about 8042.4243857185. The cubic root of 64680590 is about 401.4128992465.

The spelling of 64680590 in words is "sixty-four million, six hundred eighty thousand, five hundred ninety".