64850636667349 has 8 divisors (see below), whose sum is σ = 69840972478872. Its totient is φ = 59860561612800.

The previous prime is 64850636667329. The next prime is 64850636667361. The reversal of 64850636667349 is 94376663605846.

It can be written as a sum of positive squares in 4 ways, for example, as 5688310860324 + 59162325807025 = 2385018^2 + 7691705^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 64850636667349 - 2²⁵ = 64850603112917 is a prime.

It is a super-2 number, since 2×64850636667349² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64850636667329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64672552 + ... + 65667649.

It is an arithmetic number, because the mean of its divisors is an integer number (8730121559859).

Almost surely, 2^{64850636667349} is an apocalyptic number.

It is an amenable number.

64850636667349 is a deficient number, since it is larger than the sum of its proper divisors (4990335811523).

64850636667349 is a wasteful number, since it uses less digits than its factorization.

64850636667349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130378487.

The product of its (nonzero) digits is 2821754880, while the sum is 73.

The spelling of 64850636667349 in words is "sixty-four trillion, eight hundred fifty billion, six hundred thirty-six million, six hundred sixty-seven thousand, three hundred forty-nine".