64641339 has 36 divisors (see below), whose sum is σ = 113355216. Its totient is φ = 35326368.

The previous prime is 64641337. The next prime is 64641383. The reversal of 64641339 is 93314646.

64641339 is a `hidden beast` number, since 6 + 4 + 641 + 3 + 3 + 9 = 666.

It is not a de Polignac number, because 64641339 - 2¹ = 64641337 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64641337) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 6957 + ... + 13329.

It is an arithmetic number, because the mean of its divisors is an integer number (3148756).

Almost surely, 2^64641339 is an apocalyptic number.

64641339 is a gapful number since it is divisible by the number (69) formed by its first and last digit.

64641339 is a deficient number, since it is larger than the sum of its proper divisors (48713877).

64641339 is a wasteful number, since it uses less digits than its factorization.

64641339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6416 (or 6406 counting only the distinct ones).

The product of its digits is 46656, while the sum is 36.

The square root of 64641339 is about 8039.9837686403. The cubic root of 64641339 is about 401.3316845374.

It can be divided in two parts, 64641 and 339, that added together give a triangular number (64980 = T₃₆₀).

The spelling of 64641339 in words is "sixty-four million, six hundred forty-one thousand, three hundred thirty-nine".