1968565536 has 72 divisors (see below), whose sum is σ = 6397844544. Its totient is φ = 562446720.

The previous prime is 1968565483. The next prime is 1968565579. The reversal of 1968565536 is 6355658691.

It is a happy number.

1968565536 is a `hidden beast` number, since 1 + 9 + 6 + 85 + 6 + 553 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 486220 + ... + 490251.

It is an arithmetic number, because the mean of its divisors is an integer number (88858952).

Almost surely, 2^1968565536 is an apocalyptic number.

1968565536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1968565536 is an abundant number, since it is smaller than the sum of its proper divisors (4429279008).

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

1968565536 is a wasteful number, since it uses less digits than its factorization.

1968565536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 976494 (or 976483 counting only the distinct ones).

The product of its digits is 5832000, while the sum is 54.

The square root of 1968565536 is about 44368.5196507614. The cubic root of 1968565536 is about 1253.2853386883.

The spelling of 1968565536 in words is "one billion, nine hundred sixty-eight million, five hundred sixty-five thousand, five hundred thirty-six".