64854690 has 16 divisors (see below), whose sum is σ = 155651328. Its totient is φ = 17294576.

The previous prime is 64854683. The next prime is 64854719. The reversal of 64854690 is 9645846.

It is a super-2 number, since 2×64854690² = 8412261629992200, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1080882 + ... + 1080941.

It is an arithmetic number, because the mean of its divisors is an integer number (9728208).

Almost surely, 2^64854690 is an apocalyptic number.

64854690 is an abundant number, since it is smaller than the sum of its proper divisors (90796638).

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

64854690 is a wasteful number, since it uses less digits than its factorization.

64854690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2161833.

The product of its (nonzero) digits is 207360, while the sum is 42.

The square root of 64854690 is about 8053.2409624945. The cubic root of 64854690 is about 401.7727360774.

It can be divided in two parts, 6485 and 4690, that added together give a triangular number (11175 = T₁₄₉).

The spelling of 64854690 in words is "sixty-four million, eight hundred fifty-four thousand, six hundred ninety".