628244555647 has 4 divisors (see below), whose sum is σ = 630633318480. Its totient is φ = 625855792816.

The previous prime is 628244555593. The next prime is 628244555737. The reversal of 628244555647 is 746555442826.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-628244555647 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 628244555591 and 628244555600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628244555947) 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, 1194381022 + ... + 1194381547.

It is an arithmetic number, because the mean of its divisors is an integer number (157658329620).

Almost surely, 2^628244555647 is an apocalyptic number.

628244555647 is a deficient number, since it is larger than the sum of its proper divisors (2388762833).

628244555647 is a wasteful number, since it uses less digits than its factorization.

628244555647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2388762832.

The product of its digits is 64512000, while the sum is 58.

The spelling of 628244555647 in words is "six hundred twenty-eight billion, two hundred forty-four million, five hundred fifty-five thousand, six hundred forty-seven".