100628221949 has 2 divisors, whose sum is σ = 100628221950. Its totient is φ = 100628221948.

The previous prime is 100628221937. The next prime is 100628222003. The reversal of 100628221949 is 949122826001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61681199449 + 38947022500 = 248357^2 + 197350^2 .

It is a cyclic number.

It is not a de Polignac number, because 100628221949 - 2⁸ = 100628221693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100628221649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50314110974 + 50314110975.

It is an arithmetic number, because the mean of its divisors is an integer number (50314110975).

Almost surely, 2^100628221949 is an apocalyptic number.

It is an amenable number.

100628221949 is a deficient number, since it is larger than the sum of its proper divisors (1).

100628221949 is an equidigital number, since it uses as much as digits as its factorization.

100628221949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 124416, while the sum is 44.

The spelling of 100628221949 in words is "one hundred billion, six hundred twenty-eight million, two hundred twenty-one thousand, nine hundred forty-nine".