133856397543 has 8 divisors (see below), whose sum is σ = 194700214656. Its totient is φ = 81125089400.

The previous prime is 133856397539. The next prime is 133856397581. The reversal of 133856397543 is 345793658331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 133856397543 - 2² = 133856397539 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133856397343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2028127203 + ... + 2028127268.

It is an arithmetic number, because the mean of its divisors is an integer number (24337526832).

Almost surely, 2^133856397543 is an apocalyptic number.

133856397543 is a deficient number, since it is larger than the sum of its proper divisors (60843817113).

133856397543 is a wasteful number, since it uses less digits than its factorization.

133856397543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4056254485.

The product of its digits is 24494400, while the sum is 57.

The spelling of 133856397543 in words is "one hundred thirty-three billion, eight hundred fifty-six million, three hundred ninety-seven thousand, five hundred forty-three".