640302106019 has 4 divisors (see below), whose sum is σ = 641606184120. Its totient is φ = 638998027920.

The previous prime is 640302106001. The next prime is 640302106021. The reversal of 640302106019 is 910601203046.

640302106019 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-640302106019 is a prime.

It is a super-2 number, since 2×640302106019² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (640302106219) 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, 652038314 + ... + 652039295.

It is an arithmetic number, because the mean of its divisors is an integer number (160401546030).

Almost surely, 2^640302106019 is an apocalyptic number.

640302106019 is a deficient number, since it is larger than the sum of its proper divisors (1304078101).

640302106019 is a wasteful number, since it uses less digits than its factorization.

640302106019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1304078100.

The product of its (nonzero) digits is 7776, while the sum is 32.

The spelling of 640302106019 in words is "six hundred forty billion, three hundred two million, one hundred six thousand, nineteen".