1945217538148 has 24 divisors (see below), whose sum is σ = 3447638324480. Its totient is φ = 960180998400.

The previous prime is 1945217538091. The next prime is 1945217538169. The reversal of 1945217538148 is 8418357125491.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1945217538092 and 1945217538101.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2271073 + ... + 3008023.

Almost surely, 2^{1945217538148} is an apocalyptic number.

It is an amenable number.

1945217538148 is a deficient number, since it is larger than the sum of its proper divisors (1502420786332).

1945217538148 is a wasteful number, since it uses less digits than its factorization.

1945217538148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 745387 (or 745385 counting only the distinct ones).

The product of its digits is 9676800, while the sum is 58.

The spelling of 1945217538148 in words is "one trillion, nine hundred forty-five billion, two hundred seventeen million, five hundred thirty-eight thousand, one hundred forty-eight".