100861775661 has 8 divisors (see below), whose sum is σ = 134484464224. Its totient is φ = 67240135440.

The previous prime is 100861775621. The next prime is 100861775683. The reversal of 100861775661 is 166577168001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 100861775661 - 2¹¹ = 100861773613 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 100861775661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100861775611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 211 + ... + 449136.

It is an arithmetic number, because the mean of its divisors is an integer number (16810558028).

Almost surely, 2^100861775661 is an apocalyptic number.

It is an amenable number.

100861775661 is a deficient number, since it is larger than the sum of its proper divisors (33622688563).

100861775661 is an equidigital number, since it uses as much as digits as its factorization.

100861775661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 524171.

The product of its (nonzero) digits is 423360, while the sum is 48.

The spelling of 100861775661 in words is "one hundred billion, eight hundred sixty-one million, seven hundred seventy-five thousand, six hundred sixty-one".