64149439764673 has 8 divisors (see below), whose sum is σ = 64642183252416. Its totient is φ = 63656742536400.

The previous prime is 64149439764659. The next prime is 64149439764679. The reversal of 64149439764673 is 37646793494146.

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 64149439764673 - 2³⁷ = 64012000811201 is a prime.

It is a super-3 number, since 3×64149439764673³ (a number of 42 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64149439764596 and 64149439764605.

It is not an unprimeable number, because it can be changed into a prime (64149439764679) 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, 8778186 + ... + 14330227.

It is an arithmetic number, because the mean of its divisors is an integer number (8080272906552).

Almost surely, 2^{64149439764673} is an apocalyptic number.

It is an amenable number.

64149439764673 is a deficient number, since it is larger than the sum of its proper divisors (492743487743).

64149439764673 is a wasteful number, since it uses less digits than its factorization.

64149439764673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23129735.

The product of its digits is 1975228416, while the sum is 73.

The spelling of 64149439764673 in words is "sixty-four trillion, one hundred forty-nine billion, four hundred thirty-nine million, seven hundred sixty-four thousand, six hundred seventy-three".