9628555344638 has 4 divisors (see below), whose sum is σ = 14442833016960. Its totient is φ = 4814277672318.

The previous prime is 9628555344637. The next prime is 9628555344677. The reversal of 9628555344638 is 8364435558269.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9628555344637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2407138836158 + ... + 2407138836161.

It is an arithmetic number, because the mean of its divisors is an integer number (3610708254240).

Almost surely, 2^{9628555344638} is an apocalyptic number.

9628555344638 is a deficient number, since it is larger than the sum of its proper divisors (4814277672322).

9628555344638 is a wasteful number, since it uses less digits than its factorization.

9628555344638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4814277672321.

The product of its digits is 746496000, while the sum is 68.

The spelling of 9628555344638 in words is "nine trillion, six hundred twenty-eight billion, five hundred fifty-five million, three hundred forty-four thousand, six hundred thirty-eight".