64662043641 has 8 divisors (see below), whose sum is σ = 92848062720. Its totient is φ = 39792026832.

The previous prime is 64662043573. The next prime is 64662043681. The reversal of 64662043641 is 14634026646.

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

It is not a de Polignac number, because 64662043641 - 2¹⁰ = 64662042617 is a prime.

It is a super-3 number, since 3×64662043641³ (a number of 33 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64662043593 and 64662043602.

It is not an unprimeable number, because it can be changed into a prime (64662043681) 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, 829000521 + ... + 829000598.

It is an arithmetic number, because the mean of its divisors is an integer number (11606007840).

Almost surely, 2^64662043641 is an apocalyptic number.

It is an amenable number.

64662043641 is a deficient number, since it is larger than the sum of its proper divisors (28186019079).

64662043641 is a wasteful number, since it uses less digits than its factorization.

64662043641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1658001135.

The product of its (nonzero) digits is 497664, while the sum is 42.

The spelling of 64662043641 in words is "sixty-four billion, six hundred sixty-two million, forty-three thousand, six hundred forty-one".