133564284968 has 8 divisors (see below), whose sum is σ = 250433034330. Its totient is φ = 66782142480.

The previous prime is 133564284961. The next prime is 133564284979. The reversal of 133564284968 is 869482465331.

It can be written as a sum of positive squares in only one way, i.e., 82597610404 + 50966674564 = 287398^2 + 225758^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×133564284968² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (133564284961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8347767803 + ... + 8347767818.

Almost surely, 2^133564284968 is an apocalyptic number.

It is an amenable number.

133564284968 is a deficient number, since it is larger than the sum of its proper divisors (116868749362).

133564284968 is a wasteful number, since it uses less digits than its factorization.

133564284968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16695535627 (or 16695535623 counting only the distinct ones).

The product of its digits is 29859840, while the sum is 59.

The spelling of 133564284968 in words is "one hundred thirty-three billion, five hundred sixty-four million, two hundred eighty-four thousand, nine hundred sixty-eight".