64132881 has 4 divisors (see below), whose sum is σ = 85510512. Its totient is φ = 42755252.

The previous prime is 64132867. The next prime is 64132903. The reversal of 64132881 is 18823146.

64132881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 64132881 - 2¹⁷ = 64001809 is a prime.

It is a super-2 number, since 2×64132881² = 8226052850720322, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (64132681) 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, 10688811 + ... + 10688816.

It is an arithmetic number, because the mean of its divisors is an integer number (21377628).

Almost surely, 2^64132881 is an apocalyptic number.

It is an amenable number.

64132881 is a deficient number, since it is larger than the sum of its proper divisors (21377631).

64132881 is a wasteful number, since it uses less digits than its factorization.

64132881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21377630.

The product of its digits is 9216, while the sum is 33.

The square root of 64132881 is about 8008.3007560905. The cubic root of 64132881 is about 400.2766440427.

The spelling of 64132881 in words is "sixty-four million, one hundred thirty-two thousand, eight hundred eighty-one".