133166401644 has 12 divisors (see below), whose sum is σ = 310721603864. Its totient is φ = 44388800544.

The previous prime is 133166401579. The next prime is 133166401649. The reversal of 133166401644 is 446104661331.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×133166401644² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (133166401649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5548600057 + ... + 5548600080.

Almost surely, 2^133166401644 is an apocalyptic number.

It is an amenable number.

133166401644 is an abundant number, since it is smaller than the sum of its proper divisors (177555202220).

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

133166401644 is a wasteful number, since it uses less digits than its factorization.

133166401644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11097200144 (or 11097200142 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 39.

The spelling of 133166401644 in words is "one hundred thirty-three billion, one hundred sixty-six million, four hundred one thousand, six hundred forty-four".