105115243645 has 4 divisors (see below), whose sum is σ = 126138292380. Its totient is φ = 84092194912.

The previous prime is 105115243637. The next prime is 105115243691. The reversal of 105115243645 is 546342511501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 546342511501 = 443 ⋅1233278807.

It can be written as a sum of positive squares in 2 ways, for example, as 26794743481 + 78320500164 = 163691^2 + 279858^2 .

It is a cyclic number.

It is not a de Polignac number, because 105115243645 - 2³ = 105115243637 is a prime.

It is a super-2 number, since 2×105115243645² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10511524360 + ... + 10511524369.

It is an arithmetic number, because the mean of its divisors is an integer number (31534573095).

Almost surely, 2^105115243645 is an apocalyptic number.

It is an amenable number.

105115243645 is a deficient number, since it is larger than the sum of its proper divisors (21023048735).

105115243645 is an equidigital number, since it uses as much as digits as its factorization.

105115243645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21023048734.

The product of its (nonzero) digits is 72000, while the sum is 37.

The spelling of 105115243645 in words is "one hundred five billion, one hundred fifteen million, two hundred forty-three thousand, six hundred forty-five".