64505780035079 has 4 divisors (see below), whose sum is σ = 64505816066880. Its totient is φ = 64505744003280.

The previous prime is 64505780035069. The next prime is 64505780035087. The reversal of 64505780035079 is 97053008750546.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64505780035079 - 2⁴⁴ = 46913593990663 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64505780035009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15181934 + ... + 18960555.

It is an arithmetic number, because the mean of its divisors is an integer number (16126454016720).

Almost surely, 2^{64505780035079} is an apocalyptic number.

64505780035079 is a deficient number, since it is larger than the sum of its proper divisors (36031801).

64505780035079 is a wasteful number, since it uses less digits than its factorization.

64505780035079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36031800.

The product of its (nonzero) digits is 31752000, while the sum is 59.

The spelling of 64505780035079 in words is "sixty-four trillion, five hundred five billion, seven hundred eighty million, thirty-five thousand, seventy-nine".