1946443815145 has 4 divisors (see below), whose sum is σ = 2335732578180. Its totient is φ = 1557155052112.

The previous prime is 1946443815143. The next prime is 1946443815161. The reversal of 1946443815145 is 5415183446491.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 642480799401 + 1303963015744 = 801549^2 + 1141912^2 .

It is a cyclic number.

It is not a de Polignac number, because 1946443815145 - 2¹ = 1946443815143 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1946443815143) 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, 194644381510 + ... + 194644381519.

It is an arithmetic number, because the mean of its divisors is an integer number (583933144545).

Almost surely, 2^{1946443815145} is an apocalyptic number.

It is an amenable number.

1946443815145 is a deficient number, since it is larger than the sum of its proper divisors (389288763035).

1946443815145 is an equidigital number, since it uses as much as digits as its factorization.

1946443815145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389288763034.

The product of its digits is 8294400, while the sum is 55.

The spelling of 1946443815145 in words is "one trillion, nine hundred forty-six billion, four hundred forty-three million, eight hundred fifteen thousand, one hundred forty-five".