100990662805 has 4 divisors (see below), whose sum is σ = 121188795372. Its totient is φ = 80792530240.

The previous prime is 100990662743. The next prime is 100990662833. The reversal of 100990662805 is 508266099001.

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

It can be written as a sum of positive squares in 2 ways, for example, as 50616900324 + 50373762481 = 224982^2 + 224441^2 .

It is not a de Polignac number, because 100990662805 - 2³³ = 92400728213 is a prime.

It is a super-2 number, since 2×100990662805² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10099066276 + ... + 10099066285.

It is an arithmetic number, because the mean of its divisors is an integer number (30297198843).

Almost surely, 2^100990662805 is an apocalyptic number.

It is an amenable number.

100990662805 is a deficient number, since it is larger than the sum of its proper divisors (20198132567).

100990662805 is an equidigital number, since it uses as much as digits as its factorization.

100990662805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20198132566.

The product of its (nonzero) digits is 233280, while the sum is 46.

The spelling of 100990662805 in words is "one hundred billion, nine hundred ninety million, six hundred sixty-two thousand, eight hundred five".