1064378881 has 4 divisors (see below), whose sum is σ = 1064878164. Its totient is φ = 1063879600.

The previous prime is 1064378849. The next prime is 1064378923. The reversal of 1064378881 is 1888734601.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 917120656 + 147258225 = 30284^2 + 12135^2 .

It is a cyclic number.

It is not a de Polignac number, because 1064378881 - 2⁵ = 1064378849 is a prime.

It is a super-2 number, since 2×1064378881² = 2265804804637624322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1064378801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 246430 + ... + 250711.

It is an arithmetic number, because the mean of its divisors is an integer number (266219541).

Almost surely, 2^1064378881 is an apocalyptic number.

It is an amenable number.

1064378881 is a deficient number, since it is larger than the sum of its proper divisors (499283).

1064378881 is an equidigital number, since it uses as much as digits as its factorization.

1064378881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499282.

The product of its (nonzero) digits is 258048, while the sum is 46.

The square root of 1064378881 is about 32624.8200148292. The cubic root of 1064378881 is about 1021.0149071008.

The spelling of 1064378881 in words is "one billion, sixty-four million, three hundred seventy-eight thousand, eight hundred eighty-one".