628116906965 has 16 divisors (see below), whose sum is σ = 756507263472. Its totient is φ = 500652132864.

The previous prime is 628116906889. The next prime is 628116906983. The reversal of 628116906965 is 569609611826.

It can be written as a sum of positive squares in 8 ways, for example, as 256123039396 + 371993867569 = 506086^2 + 609913^2 .

It is a cyclic number.

It is not a de Polignac number, because 628116906965 - 2²⁰ = 628115858389 is a prime.

It is a super-2 number, since 2×628116906965² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1343927 + ... + 1749963.

It is an arithmetic number, because the mean of its divisors is an integer number (47281703967).

Almost surely, 2^628116906965 is an apocalyptic number.

It is an amenable number.

628116906965 is a deficient number, since it is larger than the sum of its proper divisors (128390356507).

628116906965 is a wasteful number, since it uses less digits than its factorization.

628116906965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407176.

The product of its (nonzero) digits is 8398080, while the sum is 59.

The spelling of 628116906965 in words is "six hundred twenty-eight billion, one hundred sixteen million, nine hundred six thousand, nine hundred sixty-five".