101843982561 has 4 divisors (see below), whose sum is σ = 135791976752. Its totient is φ = 67895988372.

The previous prime is 101843982469. The next prime is 101843982629. The reversal of 101843982561 is 165289348101.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 165289348101 = 3 ⋅55096449367.

It is not a de Polignac number, because 101843982561 - 2⁹ = 101843982049 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 101843982561.

It is not an unprimeable number, because it can be changed into a prime (101843982061) 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 3 ways as a sum of consecutive naturals, for example, 16973997091 + ... + 16973997096.

It is an arithmetic number, because the mean of its divisors is an integer number (33947994188).

Almost surely, 2^101843982561 is an apocalyptic number.

It is an amenable number.

101843982561 is a deficient number, since it is larger than the sum of its proper divisors (33947994191).

101843982561 is an equidigital number, since it uses as much as digits as its factorization.

101843982561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33947994190.

The product of its (nonzero) digits is 414720, while the sum is 48.

The spelling of 101843982561 in words is "one hundred one billion, eight hundred forty-three million, nine hundred eighty-two thousand, five hundred sixty-one".