64881291 has 16 divisors (see below), whose sum is σ = 89607168. Its totient is φ = 41731200.

The previous prime is 64881277. The next prime is 64881293. The reversal of 64881291 is 19218846.

64881291 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 64881291 - 2⁹ = 64880779 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64881293) 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 15 ways as a sum of consecutive naturals, for example, 6771 + ... + 13251.

It is an arithmetic number, because the mean of its divisors is an integer number (5600448).

Almost surely, 2^64881291 is an apocalyptic number.

64881291 is a deficient number, since it is larger than the sum of its proper divisors (24725877).

64881291 is a wasteful number, since it uses less digits than its factorization.

64881291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6602.

The product of its digits is 27648, while the sum is 39.

The square root of 64881291 is about 8054.8923642715. The cubic root of 64881291 is about 401.8276593512.

The spelling of 64881291 in words is "sixty-four million, eight hundred eighty-one thousand, two hundred ninety-one".