640003643097 has 16 divisors (see below), whose sum is σ = 1050262389120. Its totient is φ = 337584339072.

The previous prime is 640003643087. The next prime is 640003643101. The reversal of 640003643097 is 790346300046.

It is not a de Polignac number, because 640003643097 - 2⁸ = 640003642841 is a prime.

It is not an unprimeable number, because it can be changed into a prime (640003643077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1172167572 + ... + 1172168117.

It is an arithmetic number, because the mean of its divisors is an integer number (65641399320).

Almost surely, 2^640003643097 is an apocalyptic number.

It is an amenable number.

640003643097 is a deficient number, since it is larger than the sum of its proper divisors (410258746023).

640003643097 is a wasteful number, since it uses less digits than its factorization.

640003643097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2344335712.

The product of its (nonzero) digits is 326592, while the sum is 42.

The spelling of 640003643097 in words is "six hundred forty billion, three million, six hundred forty-three thousand, ninety-seven".