1919966144 has 28 divisors (see below), whose sum is σ = 3846935664. Its totient is φ = 950659584.

The previous prime is 1919966143. The next prime is 1919966161. The reversal of 1919966144 is 4416699191.

It is a junction number, because it is equal to n+sod(n) for n = 1919966092 and 1919966101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1919966143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139037 + ... + 152220.

Almost surely, 2^1919966144 is an apocalyptic number.

It is an amenable number.

1919966144 is an abundant number, since it is smaller than the sum of its proper divisors (1926969520).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1919966144 is a wasteful number, since it uses less digits than its factorization.

1919966144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291372 (or 291362 counting only the distinct ones).

The product of its digits is 419904, while the sum is 50.

The square root of 1919966144 is about 43817.4182717330. The cubic root of 1919966144 is about 1242.8856968897.

The spelling of 1919966144 in words is "one billion, nine hundred nineteen million, nine hundred sixty-six thousand, one hundred forty-four".