64617577052243 has 8 divisors (see below), whose sum is σ = 66230213775360. Its totient is φ = 63022187781000.

The previous prime is 64617577052239. The next prime is 64617577052293. The reversal of 64617577052243 is 34225077571646.

It is a happy number.

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 64617577052243 - 2² = 64617577052239 is a prime.

It is a super-2 number, since 2×64617577052243² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (59).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64617577052293) 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, 4311855383 + ... + 4311870368.

It is an arithmetic number, because the mean of its divisors is an integer number (8278776721920).

Almost surely, 2^{64617577052243} is an apocalyptic number.

64617577052243 is a deficient number, since it is larger than the sum of its proper divisors (1612636723117).

64617577052243 is a wasteful number, since it uses less digits than its factorization.

64617577052243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8623725937.

The product of its (nonzero) digits is 59270400, while the sum is 59.

The spelling of 64617577052243 in words is "sixty-four trillion, six hundred seventeen billion, five hundred seventy-seven million, fifty-two thousand, two hundred forty-three".