1945398675 has 54 divisors (see below), whose sum is σ = 3543025836. Its totient is φ = 941186400.

The previous prime is 1945398613. The next prime is 1945398773. The reversal of 1945398675 is 5768935491.

It is not a de Polignac number, because 1945398675 - 2¹⁰ = 1945397651 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 4201494 + ... + 4201956.

Almost surely, 2^1945398675 is an apocalyptic number.

1945398675 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1945398675 is a deficient number, since it is larger than the sum of its proper divisors (1597627161).

1945398675 is an equidigital number, since it uses as much as digits as its factorization.

1945398675 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 961 (or 482 counting only the distinct ones).

The product of its digits is 8164800, while the sum is 57.

The square root of 1945398675 is about 44106.6738147415. The cubic root of 1945398675 is about 1248.3495390754.

The spelling of 1945398675 in words is "one billion, nine hundred forty-five million, three hundred ninety-eight thousand, six hundred seventy-five".