100555111005551 has 4 divisors (see below), whose sum is σ = 100638008872392. Its totient is φ = 100472213138712.

The previous prime is 100555111005527. The next prime is 100555111005593. The reversal of 100555111005551 is 155500111555001.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 100555111005551 - 2³⁴ = 100537931136367 is a prime.

It is a super-2 number, since 2×100555111005551² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100555111008551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41448931601 + ... + 41448934026.

It is an arithmetic number, because the mean of its divisors is an integer number (25159502218098).

Almost surely, 2^{100555111005551} is an apocalyptic number.

100555111005551 is a deficient number, since it is larger than the sum of its proper divisors (82897866841).

100555111005551 is an equidigital number, since it uses as much as digits as its factorization.

100555111005551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82897866840.

The product of its (nonzero) digits is 15625, while the sum is 35.

The spelling of 100555111005551 in words is "one hundred trillion, five hundred fifty-five billion, one hundred eleven million, five thousand, five hundred fifty-one".