428926556503 has 4 divisors (see below), whose sum is σ = 428927878120. Its totient is φ = 428925234888.

The previous prime is 428926556417. The next prime is 428926556533. The reversal of 428926556503 is 305655629824.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-428926556503 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428926556533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 198433 + ... + 947221.

It is an arithmetic number, because the mean of its divisors is an integer number (107231969530).

Almost surely, 2^428926556503 is an apocalyptic number.

428926556503 is a deficient number, since it is larger than the sum of its proper divisors (1321617).

428926556503 is an equidigital number, since it uses as much as digits as its factorization.

428926556503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1321616.

The product of its (nonzero) digits is 15552000, while the sum is 55.

The spelling of 428926556503 in words is "four hundred twenty-eight billion, nine hundred twenty-six million, five hundred fifty-six thousand, five hundred three".