64780811003 has 4 divisors (see below), whose sum is σ = 65375130480. Its totient is φ = 64186491528.

The previous prime is 64780810987. The next prime is 64780811033. The reversal of 64780811003 is 30011808746.

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 64780811003 - 2⁴ = 64780810987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64780811033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 297159575 + ... + 297159792.

It is an arithmetic number, because the mean of its divisors is an integer number (16343782620).

Almost surely, 2^64780811003 is an apocalyptic number.

64780811003 is a deficient number, since it is larger than the sum of its proper divisors (594319477).

64780811003 is a wasteful number, since it uses less digits than its factorization.

64780811003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 594319476.

The product of its (nonzero) digits is 32256, while the sum is 38.

The spelling of 64780811003 in words is "sixty-four billion, seven hundred eighty million, eight hundred eleven thousand, three".