1916396545 has 16 divisors (see below), whose sum is σ = 2659870080. Its totient is φ = 1298265984.

The previous prime is 1916396483. The next prime is 1916396549. The reversal of 1916396545 is 5456936191.

It is a cyclic number.

It is not a de Polignac number, because 1916396545 - 2¹⁷ = 1916265473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1916396549) 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 15 ways as a sum of consecutive naturals, for example, 326940 + ... + 332749.

It is an arithmetic number, because the mean of its divisors is an integer number (166241880).

Almost surely, 2^1916396545 is an apocalyptic number.

It is an amenable number.

1916396545 is a deficient number, since it is larger than the sum of its proper divisors (743473535).

1916396545 is an equidigital number, since it uses as much as digits as its factorization.

1916396545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 659784.

The product of its digits is 874800, while the sum is 49.

The square root of 1916396545 is about 43776.6666730120. Note that the first 4 decimals coincide. The cubic root of 1916396545 is about 1242.1149617898.

The spelling of 1916396545 in words is "one billion, nine hundred sixteen million, three hundred ninety-six thousand, five hundred forty-five".