105542443621 has 8 divisors (see below), whose sum is σ = 107284826880. Its totient is φ = 103810220592.

The previous prime is 105542443583. The next prime is 105542443637. The reversal of 105542443621 is 126344245501.

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

It is a cyclic number.

It is not a de Polignac number, because 105542443621 - 2²⁷ = 105408225893 is a prime.

It is a super-2 number, since 2×105542443621² (a number of 23 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 (105542443121) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 2519110 + ... + 2560663.

It is an arithmetic number, because the mean of its divisors is an integer number (13410603360).

Almost surely, 2^105542443621 is an apocalyptic number.

It is an amenable number.

105542443621 is a deficient number, since it is larger than the sum of its proper divisors (1742383259).

105542443621 is an equidigital number, since it uses as much as digits as its factorization.

105542443621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5080115.

The product of its (nonzero) digits is 115200, while the sum is 37.

The spelling of 105542443621 in words is "one hundred five billion, five hundred forty-two million, four hundred forty-three thousand, six hundred twenty-one".