628834623647 has 4 divisors (see below), whose sum is σ = 630548069856. Its totient is φ = 627121177440.

The previous prime is 628834623623. The next prime is 628834623667. The reversal of 628834623647 is 746326438826.

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

It is a cyclic number.

It is not a de Polignac number, because 628834623647 - 2¹² = 628834619551 is a prime.

It is a super-3 number, since 3×628834623647³ (a number of 36 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628834623667) 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, 856722554 + ... + 856723287.

It is an arithmetic number, because the mean of its divisors is an integer number (157637017464).

Almost surely, 2^628834623647 is an apocalyptic number.

628834623647 is a deficient number, since it is larger than the sum of its proper divisors (1713446209).

628834623647 is a wasteful number, since it uses less digits than its factorization.

628834623647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1713446208.

The product of its digits is 55738368, while the sum is 59.

The spelling of 628834623647 in words is "six hundred twenty-eight billion, eight hundred thirty-four million, six hundred twenty-three thousand, six hundred forty-seven".