100555505610557 has 2 divisors, whose sum is σ = 100555505610558. Its totient is φ = 100555505610556.

The previous prime is 100555505610541. The next prime is 100555505610559. The reversal of 100555505610557 is 755016505555001.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100292794007641 + 262711602916 = 10014629^2 + 512554^2 .

It is a cyclic number.

It is not a de Polignac number, because 100555505610557 - 2⁴ = 100555505610541 is a prime.

It is a super-2 number, since 2×100555505610557² (a number of 29 digits) contains 22 as substring.

Together with 100555505610559, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100555505610559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50277752805278 + 50277752805279.

It is an arithmetic number, because the mean of its divisors is an integer number (50277752805279).

Almost surely, 2^{100555505610557} is an apocalyptic number.

It is an amenable number.

100555505610557 is a deficient number, since it is larger than the sum of its proper divisors (1).

100555505610557 is an equidigital number, since it uses as much as digits as its factorization.

100555505610557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3281250, while the sum is 50.

The spelling of 100555505610557 in words is "one hundred trillion, five hundred fifty-five billion, five hundred five million, six hundred ten thousand, five hundred fifty-seven".