64255491 has 16 divisors (see below), whose sum is σ = 99333120. Its totient is φ = 40974120.

The previous prime is 64255489. The next prime is 64255501. The reversal of 64255491 is 19455246.

64255491 is a `hidden beast` number, since 642 + 5 + 5 + 4 + 9 + 1 = 666.

64255491 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 64255491 - 2¹ = 64255489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64255691) 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, 51115 + ... + 52356.

It is an arithmetic number, because the mean of its divisors is an integer number (6208320).

Almost surely, 2^64255491 is an apocalyptic number.

64255491 is a deficient number, since it is larger than the sum of its proper divisors (35077629).

64255491 is a wasteful number, since it uses less digits than its factorization.

64255491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103503 (or 103497 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 64255491 is about 8015.9522827921. The cubic root of 64255491 is about 400.5315661972.

It can be divided in two parts, 64255 and 491, that added together give a palindrome (64746).

The spelling of 64255491 in words is "sixty-four million, two hundred fifty-five thousand, four hundred ninety-one".