640265534103 has 8 divisors (see below), whose sum is σ = 919355638768. Its totient is φ = 394009559424.

The previous prime is 640265534087. The next prime is 640265534113. The reversal of 640265534103 is 301435562046.

640265534103 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 640265534103 - 2⁴ = 640265534087 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 16417064977 = 640265534103 / (6 + 4 + 0 + 2 + 6 + 5 + 5 + 3 + 4 + 1 + 0 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640265534113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8208532450 + ... + 8208532527.

It is an arithmetic number, because the mean of its divisors is an integer number (114919454846).

Almost surely, 2^640265534103 is an apocalyptic number.

640265534103 is a deficient number, since it is larger than the sum of its proper divisors (279090104665).

640265534103 is a wasteful number, since it uses less digits than its factorization.

640265534103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16417064993.

The product of its (nonzero) digits is 259200, while the sum is 39.

The spelling of 640265534103 in words is "six hundred forty billion, two hundred sixty-five million, five hundred thirty-four thousand, one hundred three".