1919462945 has 16 divisors (see below), whose sum is σ = 2441415168. Its totient is φ = 1443720960.

The previous prime is 1919462927. The next prime is 1919462957. The reversal of 1919462945 is 5492649191.

It is a de Polignac number, because none of the positive numbers 2^k-1919462945 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1919462893 and 1919462902.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72842 + ... + 95628.

It is an arithmetic number, because the mean of its divisors is an integer number (152588448).

Almost surely, 2^1919462945 is an apocalyptic number.

It is an amenable number.

1919462945 is a deficient number, since it is larger than the sum of its proper divisors (521952223).

1919462945 is a wasteful number, since it uses less digits than its factorization.

1919462945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23800.

The product of its digits is 699840, while the sum is 50.

The square root of 1919462945 is about 43811.6758980982. The cubic root of 1919462945 is about 1242.7771058281. Note that the first 3 decimals are identical.

The spelling of 1919462945 in words is "one billion, nine hundred nineteen million, four hundred sixty-two thousand, nine hundred forty-five".