646256036134503 has 12 divisors (see below), whose sum is σ = 933481943972968. Its totient is φ = 430836894550800.

The previous prime is 646256036134451. The next prime is 646256036134517. The reversal of 646256036134503 is 305431630652646.

646256036134503 is a `hidden beast` number, since 6 + 4 + 6 + 2 + 560 + 36 + 1 + 3 + 45 + 0 + 3 = 666.

It is not a de Polignac number, because 646256036134503 - 2⁹ = 646256036133991 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 646256036134503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646256036134573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29620825 + ... + 46582242.

Almost surely, 2^{646256036134503} is an apocalyptic number.

646256036134503 is a deficient number, since it is larger than the sum of its proper divisors (287225907838465).

646256036134503 is a wasteful number, since it uses less digits than its factorization.

646256036134503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77145374 (or 77145371 counting only the distinct ones).

The product of its (nonzero) digits is 27993600, while the sum is 54.

The spelling of 646256036134503 in words is "six hundred forty-six trillion, two hundred fifty-six billion, thirty-six million, one hundred thirty-four thousand, five hundred three".