640265463343 has 8 divisors (see below), whose sum is σ = 728839737216. Its totient is φ = 556752576600.

The previous prime is 640265463337. The next prime is 640265463347. The reversal of 640265463343 is 343364562046.

640265463343 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 640265463343 - 2¹⁷ = 640265332271 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 640265463293 and 640265463302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640265463347) 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, 1265346513 + ... + 1265347018.

It is an arithmetic number, because the mean of its divisors is an integer number (91104967152).

Almost surely, 2^640265463343 is an apocalyptic number.

640265463343 is a deficient number, since it is larger than the sum of its proper divisors (88574273873).

640265463343 is a wasteful number, since it uses less digits than its factorization.

640265463343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2530693565.

The product of its (nonzero) digits is 3732480, while the sum is 46.

The spelling of 640265463343 in words is "six hundred forty billion, two hundred sixty-five million, four hundred sixty-three thousand, three hundred forty-three".