1968064536 has 32 divisors (see below), whose sum is σ = 5179118400. Its totient is φ = 621493920.

The previous prime is 1968064531. The next prime is 1968064537. The reversal of 1968064536 is 6354608691.

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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2157510 + ... + 2158421.

It is an arithmetic number, because the mean of its divisors is an integer number (161847450).

Almost surely, 2^1968064536 is an apocalyptic number.

It is an amenable number.

1968064536 is an abundant number, since it is smaller than the sum of its proper divisors (3211053864).

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

1968064536 is a wasteful number, since it uses less digits than its factorization.

1968064536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4315959 (or 4315955 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 48.

The square root of 1968064536 is about 44362.8733965689. The cubic root of 1968064536 is about 1253.1790092795.

The spelling of 1968064536 in words is "one billion, nine hundred sixty-eight million, sixty-four thousand, five hundred thirty-six".