1945989195 has 32 divisors (see below), whose sum is σ = 3227019264. Its totient is φ = 1000320000.

The previous prime is 1945989193. The next prime is 1945989203. The reversal of 1945989195 is 5919895491.

It is not a de Polignac number, because 1945989195 - 2¹ = 1945989193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1945989193) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 108379 + ... + 125051.

It is an arithmetic number, because the mean of its divisors is an integer number (100844352).

Almost surely, 2^1945989195 is an apocalyptic number.

1945989195 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1945989195 is a deficient number, since it is larger than the sum of its proper divisors (1281030069).

1945989195 is a wasteful number, since it uses less digits than its factorization.

1945989195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16963.

The product of its digits is 5248800, while the sum is 60.

The square root of 1945989195 is about 44113.3675318491. The cubic root of 1945989195 is about 1248.4758372310.

The spelling of 1945989195 in words is "one billion, nine hundred forty-five million, nine hundred eighty-nine thousand, one hundred ninety-five".