64514881 has 8 divisors (see below), whose sum is σ = 69430824. Its totient is φ = 59723520.

The previous prime is 64514867. The next prime is 64514893. The reversal of 64514881 is 18841546.

64514881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 194481 + 64320400 = 441^2 + 8020^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64514881 - 2⁹ = 64514369 is a prime.

It is a super-2 number, since 2×64514881² = 8324339740888322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64514881.

It is not an unprimeable number, because it can be changed into a prime (64514831) 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 7 ways as a sum of consecutive naturals, for example, 30070 + ... + 32143.

It is an arithmetic number, because the mean of its divisors is an integer number (8678853).

Almost surely, 2^64514881 is an apocalyptic number.

64514881 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

64514881 is a deficient number, since it is larger than the sum of its proper divisors (4915943).

64514881 is a wasteful number, since it uses less digits than its factorization.

64514881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62291.

The product of its digits is 30720, while the sum is 37.

The square root of 64514881 is about 8032.1155992677. The cubic root of 64514881 is about 401.0698049924.

The spelling of 64514881 in words is "sixty-four million, five hundred fourteen thousand, eight hundred eighty-one".