64144065423361 has 16 divisors (see below), whose sum is σ = 79973947219968. Its totient is φ = 49981060270800.

The previous prime is 64144065423349. The next prime is 64144065423379. The reversal of 64144065423361 is 16332456044146.

It is a cyclic number.

It is not a de Polignac number, because 64144065423361 - 2⁹ = 64144065422849 is a prime.

It is a super-2 number, since 2×64144065423361² (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 (64144065423331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8148705 + ... + 13953118.

It is an arithmetic number, because the mean of its divisors is an integer number (4998371701248).

Almost surely, 2^{64144065423361} is an apocalyptic number.

It is an amenable number.

64144065423361 is a deficient number, since it is larger than the sum of its proper divisors (15829881796607).

64144065423361 is a wasteful number, since it uses less digits than its factorization.

64144065423361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22139532.

The product of its (nonzero) digits is 4976640, while the sum is 49.

The spelling of 64144065423361 in words is "sixty-four trillion, one hundred forty-four billion, sixty-five million, four hundred twenty-three thousand, three hundred sixty-one".