64781853 has 16 divisors (see below), whose sum is σ = 89803200. Its totient is φ = 41489280.

The previous prime is 64781851. The next prime is 64781881. The reversal of 64781853 is 35818746.

It is not a de Polignac number, because 64781853 - 2¹ = 64781851 is a prime.

It is a super-2 number, since 2×64781853² = 8393376956227218, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64781851) 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 15 ways as a sum of consecutive naturals, for example, 16593 + ... + 20121.

It is an arithmetic number, because the mean of its divisors is an integer number (5612700).

Almost surely, 2^64781853 is an apocalyptic number.

It is an amenable number.

64781853 is a deficient number, since it is larger than the sum of its proper divisors (25021347).

64781853 is a wasteful number, since it uses less digits than its factorization.

64781853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3772.

The product of its digits is 161280, while the sum is 42.

The square root of 64781853 is about 8048.7174754740. The cubic root of 64781853 is about 401.6222721050.

The spelling of 64781853 in words is "sixty-four million, seven hundred eighty-one thousand, eight hundred fifty-three".