64739641 has 8 divisors (see below), whose sum is σ = 67912704. Its totient is φ = 61596480.

The previous prime is 64739627. The next prime is 64739657. The reversal of 64739641 is 14693746.

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 64739641 - 2¹³ = 64731449 is a prime.

It is a super-2 number, since 2×64739641² = 8382442233617762, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64739594 and 64739603.

It is not an unprimeable number, because it can be changed into a prime (64739611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2976 + ... + 11761.

It is an arithmetic number, because the mean of its divisors is an integer number (8489088).

Almost surely, 2^64739641 is an apocalyptic number.

It is an amenable number.

64739641 is a deficient number, since it is larger than the sum of its proper divisors (3173063).

64739641 is a wasteful number, since it uses less digits than its factorization.

64739641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14951.

The product of its digits is 108864, while the sum is 40.

The square root of 64739641 is about 8046.0947670283. The cubic root of 64739641 is about 401.5350204949.

The spelling of 64739641 in words is "sixty-four million, seven hundred thirty-nine thousand, six hundred forty-one".