64780689535 has 8 divisors (see below), whose sum is σ = 78463340496. Its totient is φ = 51340209600.

The previous prime is 64780689529. The next prime is 64780689557. The reversal of 64780689535 is 53598608746.

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

It is not a de Polignac number, because 64780689535 - 2¹¹ = 64780687487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60542166 + ... + 60543235.

It is an arithmetic number, because the mean of its divisors is an integer number (9807917562).

Almost surely, 2^64780689535 is an apocalyptic number.

64780689535 is a deficient number, since it is larger than the sum of its proper divisors (13682650961).

64780689535 is a wasteful number, since it uses less digits than its factorization.

64780689535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121085513.

The product of its (nonzero) digits is 43545600, while the sum is 61.

The spelling of 64780689535 in words is "sixty-four billion, seven hundred eighty million, six hundred eighty-nine thousand, five hundred thirty-five".