1919162445 has 32 divisors (see below), whose sum is σ = 3117121920. Its totient is φ = 1008184320.

The previous prime is 1919162411. The next prime is 1919162449. The reversal of 1919162445 is 5442619191.

It is a happy number.

It is not a de Polignac number, because 1919162445 - 2¹⁰ = 1919161421 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1919162397 and 1919162406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1919162449) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 265641 + ... + 272769.

It is an arithmetic number, because the mean of its divisors is an integer number (97410060).

Almost surely, 2^1919162445 is an apocalyptic number.

1919162445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1919162445 is a deficient number, since it is larger than the sum of its proper divisors (1197959475).

1919162445 is a wasteful number, since it uses less digits than its factorization.

1919162445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7405.

The product of its digits is 77760, while the sum is 42.

The square root of 1919162445 is about 43808.2463127663. The cubic root of 1919162445 is about 1242.7122484484.

The spelling of 1919162445 in words is "one billion, nine hundred nineteen million, one hundred sixty-two thousand, four hundred forty-five".