64640105360003 has 4 divisors (see below), whose sum is σ = 64681728095208. Its totient is φ = 64598482624800.

The previous prime is 64640105359967. The next prime is 64640105360009. The reversal of 64640105360003 is 30006350104646.

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 64640105360003 - 2³⁴ = 64622925490819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64640105360009) 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, 20811365273 + ... + 20811368378.

It is an arithmetic number, because the mean of its divisors is an integer number (16170432023802).

Almost surely, 2^{64640105360003} is an apocalyptic number.

64640105360003 is a deficient number, since it is larger than the sum of its proper divisors (41622735205).

64640105360003 is a wasteful number, since it uses less digits than its factorization.

64640105360003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41622735204.

The product of its (nonzero) digits is 155520, while the sum is 38.

Adding to 64640105360003 its reverse (30006350104646), we get a palindrome (94646455464649).

The spelling of 64640105360003 in words is "sixty-four trillion, six hundred forty billion, one hundred five million, three hundred sixty thousand, three".