100619642681 has 2 divisors, whose sum is σ = 100619642682. Its totient is φ = 100619642680.

The previous prime is 100619642639. The next prime is 100619642689. The reversal of 100619642681 is 186246916001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76837068025 + 23782574656 = 277195^2 + 154216^2 .

It is a cyclic number.

It is not a de Polignac number, because 100619642681 - 2¹⁴ = 100619626297 is a prime.

It is a super-2 number, since 2×100619642681² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (100619642689) by changing a digit.

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 as a sum of consecutive naturals, namely, 50309821340 + 50309821341.

It is an arithmetic number, because the mean of its divisors is an integer number (50309821341).

Almost surely, 2^100619642681 is an apocalyptic number.

It is an amenable number.

100619642681 is a deficient number, since it is larger than the sum of its proper divisors (1).

100619642681 is an equidigital number, since it uses as much as digits as its factorization.

100619642681 is an odious number, because the sum of its binary digits is odd.

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

The spelling of 100619642681 in words is "one hundred billion, six hundred nineteen million, six hundred forty-two thousand, six hundred eighty-one".