64002042440251 has 8 divisors (see below), whose sum is σ = 64205774060400. Its totient is φ = 63798632927328.

The previous prime is 64002042440227. The next prime is 64002042440257. The reversal of 64002042440251 is 15204424020046.

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 64002042440251 - 2²⁷ = 64001908222523 is a prime.

It is a super-2 number, since 2×64002042440251² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64002042440257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80128776 + ... + 80923573.

It is an arithmetic number, because the mean of its divisors is an integer number (8025721757550).

Almost surely, 2^{64002042440251} is an apocalyptic number.

64002042440251 is a deficient number, since it is larger than the sum of its proper divisors (203731620149).

64002042440251 is a wasteful number, since it uses less digits than its factorization.

64002042440251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161053613.

The product of its (nonzero) digits is 61440, while the sum is 34.

Adding to 64002042440251 its reverse (15204424020046), we get a palindrome (79206466460297).

The spelling of 64002042440251 in words is "sixty-four trillion, two billion, forty-two million, four hundred forty thousand, two hundred fifty-one".