100628397964909 has 2 divisors, whose sum is σ = 100628397964910. Its totient is φ = 100628397964908.

The previous prime is 100628397964813. The next prime is 100628397964949. The reversal of 100628397964909 is 909469793826001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68945571402409 + 31682826562500 = 8303347^2 + 5628750^2 .

It is an emirp because it is prime and its reverse (909469793826001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 100628397964909 - 2¹¹ = 100628397962861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100628397964949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50314198982454 + 50314198982455.

It is an arithmetic number, because the mean of its divisors is an integer number (50314198982455).

Almost surely, 2^{100628397964909} is an apocalyptic number.

It is an amenable number.

100628397964909 is a deficient number, since it is larger than the sum of its proper divisors (1).

100628397964909 is an equidigital number, since it uses as much as digits as its factorization.

100628397964909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 317447424, while the sum is 73.

The spelling of 100628397964909 in words is "one hundred trillion, six hundred twenty-eight billion, three hundred ninety-seven million, nine hundred sixty-four thousand, nine hundred nine".