1945543445 has 8 divisors (see below), whose sum is σ = 2415157560. Its totient is φ = 1502764480.

The previous prime is 1945543429. The next prime is 1945543447. The reversal of 1945543445 is 5443455491.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 363970084 + 1581573361 = 19078^2 + 39769^2 .

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

It is not a de Polignac number, because 1945543445 - 2⁴ = 1945543429 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1945543396 and 1945543405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1945543447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6708626 + ... + 6708915.

It is an arithmetic number, because the mean of its divisors is an integer number (301894695).

Almost surely, 2^1945543445 is an apocalyptic number.

It is an amenable number.

1945543445 is a deficient number, since it is larger than the sum of its proper divisors (469614115).

1945543445 is a wasteful number, since it uses less digits than its factorization.

1945543445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13417575.

The product of its digits is 864000, while the sum is 44.

The square root of 1945543445 is about 44108.3149190717. The cubic root of 1945543445 is about 1248.3805042931.

The spelling of 1945543445 in words is "one billion, nine hundred forty-five million, five hundred forty-three thousand, four hundred forty-five".