100427036561 has 2 divisors, whose sum is σ = 100427036562. Its totient is φ = 100427036560.

The previous prime is 100427036527. The next prime is 100427036599. The reversal of 100427036561 is 165630724001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 100387585600 + 39450961 = 316840^2 + 6281^2 .

It is an emirp because it is prime and its reverse (165630724001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 100427036561 - 2⁶ = 100427036497 is a prime.

It is not a weakly prime, because it can be changed into another prime (100427033561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50213518280 + 50213518281.

It is an arithmetic number, because the mean of its divisors is an integer number (50213518281).

Almost surely, 2^100427036561 is an apocalyptic number.

It is an amenable number.

100427036561 is a deficient number, since it is larger than the sum of its proper divisors (1).

100427036561 is an equidigital number, since it uses as much as digits as its factorization.

100427036561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 35.

The spelling of 100427036561 in words is "one hundred billion, four hundred twenty-seven million, thirty-six thousand, five hundred sixty-one".