100255858681 has 4 divisors (see below), whose sum is σ = 109370027664. Its totient is φ = 91141689700.

The previous prime is 100255858669. The next prime is 100255858691. The reversal of 100255858681 is 186858552001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 100255858681 - 2⁹ = 100255858169 is a prime.

It is a super-2 number, since 2×100255858681² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100255858601) 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, 4557084475 + ... + 4557084496.

It is an arithmetic number, because the mean of its divisors is an integer number (27342506916).

Almost surely, 2^100255858681 is an apocalyptic number.

100255858681 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

100255858681 is a deficient number, since it is larger than the sum of its proper divisors (9114168983).

100255858681 is an equidigital number, since it uses as much as digits as its factorization.

100255858681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9114168982.

The product of its (nonzero) digits is 768000, while the sum is 49.

The spelling of 100255858681 in words is "one hundred billion, two hundred fifty-five million, eight hundred fifty-eight thousand, six hundred eighty-one".