105566631641 has 4 divisors (see below), whose sum is σ = 106040024832. Its totient is φ = 105093238452.

The previous prime is 105566631629. The next prime is 105566631697. The reversal of 105566631641 is 146136665501.

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: 146136665501 = 61 ⋅2395683041.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-105566631641 is a prime.

It is a super-2 number, since 2×105566631641² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 105566631592 and 105566631601.

It is not an unprimeable number, because it can be changed into a prime (105566631601) 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, 236696261 + ... + 236696706.

It is an arithmetic number, because the mean of its divisors is an integer number (26510006208).

Almost surely, 2^105566631641 is an apocalyptic number.

It is an amenable number.

105566631641 is a deficient number, since it is larger than the sum of its proper divisors (473393191).

105566631641 is an equidigital number, since it uses as much as digits as its factorization.

105566631641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473393190.

The product of its (nonzero) digits is 388800, while the sum is 44.

The spelling of 105566631641 in words is "one hundred five billion, five hundred sixty-six million, six hundred thirty-one thousand, six hundred forty-one".