628967851169 has 4 divisors (see below), whose sum is σ = 718820401344. Its totient is φ = 539115300996.

The previous prime is 628967851157. The next prime is 628967851189. The reversal of 628967851169 is 961158769826.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 628967851169 - 2⁸ = 628967850913 is a prime.

It is a super-2 number, since 2×628967851169² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 628967851099 and 628967851108.

It is not an unprimeable number, because it can be changed into a prime (628967851189) 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, 44926275077 + ... + 44926275090.

It is an arithmetic number, because the mean of its divisors is an integer number (179705100336).

Almost surely, 2^628967851169 is an apocalyptic number.

It is an amenable number.

628967851169 is a deficient number, since it is larger than the sum of its proper divisors (89852550175).

628967851169 is an equidigital number, since it uses as much as digits as its factorization.

628967851169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89852550174.

The product of its digits is 78382080, while the sum is 68.

The spelling of 628967851169 in words is "six hundred twenty-eight billion, nine hundred sixty-seven million, eight hundred fifty-one thousand, one hundred sixty-nine".