1965563073 has 12 divisors (see below), whose sum is σ = 2937048660. Its totient is φ = 1265189856.

The previous prime is 1965563027. The next prime is 1965563081. The reversal of 1965563073 is 3703655691.

1965563073 is a `hidden beast` number, since 1 + 9 + 6 + 5 + 5 + 630 + 7 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 887622849 + 1077940224 = 29793^2 + 32832^2 .

It is not a de Polignac number, because 1965563073 - 2⁶ = 1965563009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1965563473) 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 11 ways as a sum of consecutive naturals, for example, 3765186 + ... + 3765707.

It is an arithmetic number, because the mean of its divisors is an integer number (244754055).

Almost surely, 2^1965563073 is an apocalyptic number.

It is an amenable number.

1965563073 is a deficient number, since it is larger than the sum of its proper divisors (971485587).

1965563073 is a wasteful number, since it uses less digits than its factorization.

1965563073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7530928 (or 7530925 counting only the distinct ones).

The product of its (nonzero) digits is 510300, while the sum is 45.

The square root of 1965563073 is about 44334.6712291859. The cubic root of 1965563073 is about 1252.6478427560.

It can be divided in two parts, 19655 and 63073, that added together give a palindrome (82728).

The spelling of 1965563073 in words is "one billion, nine hundred sixty-five million, five hundred sixty-three thousand, seventy-three".