640103121344 has 14 divisors (see below), whose sum is σ = 1270204631544. Its totient is φ = 320051560640.

The previous prime is 640103121341. The next prime is 640103121349. The reversal of 640103121344 is 443121301046.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640103121341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5000805572 + ... + 5000805699.

Almost surely, 2^640103121344 is an apocalyptic number.

640103121344 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

640103121344 is a deficient number, since it is larger than the sum of its proper divisors (630101510200).

640103121344 is a wasteful number, since it uses less digits than its factorization.

640103121344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10001611283 (or 10001611273 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The spelling of 640103121344 in words is "six hundred forty billion, one hundred three million, one hundred twenty-one thousand, three hundred forty-four".