628417399381 has 2 divisors, whose sum is σ = 628417399382. Its totient is φ = 628417399380.

The previous prime is 628417399361. The next prime is 628417399451. The reversal of 628417399381 is 183993714826.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 603379400625 + 25037998756 = 776775^2 + 158234^2 .

It is a cyclic number.

It is not a de Polignac number, because 628417399381 - 2³⁵ = 594057661013 is a prime.

It is a super-2 number, since 2×628417399381² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (628417399321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314208699690 + 314208699691.

It is an arithmetic number, because the mean of its divisors is an integer number (314208699691).

Almost surely, 2^628417399381 is an apocalyptic number.

It is an amenable number.

628417399381 is a deficient number, since it is larger than the sum of its proper divisors (1).

628417399381 is an equidigital number, since it uses as much as digits as its factorization.

628417399381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15676416, while the sum is 61.

The spelling of 628417399381 in words is "six hundred twenty-eight billion, four hundred seventeen million, three hundred ninety-nine thousand, three hundred eighty-one".