1968064533 has 28 divisors (see below), whose sum is σ = 2999187628. Its totient is φ = 1290504960.

The previous prime is 1968064531. The next prime is 1968064537. The reversal of 1968064533 is 3354608691.

1968064533 is a `hidden beast` number, since 196 + 8 + 0 + 6 + 453 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 937461924 + 1030602609 = 30618^2 + 32103^2 .

It is not a de Polignac number, because 1968064533 - 2¹ = 1968064531 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1968064531) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 22341 + ... + 66597.

Almost surely, 2^1968064533 is an apocalyptic number.

It is an amenable number.

1968064533 is a deficient number, since it is larger than the sum of its proper divisors (1031123095).

1968064533 is an frugal number, since it uses more digits than its factorization.

1968064533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44336 (or 44321 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 45.

The square root of 1968064533 is about 44362.8733627568. The cubic root of 1968064533 is about 1253.1790086427.

The spelling of 1968064533 in words is "one billion, nine hundred sixty-eight million, sixty-four thousand, five hundred thirty-three".