133040881656 has 96 divisors (see below), whose sum is σ = 370553040000. Its totient is φ = 43097769792.

The previous prime is 133040881651. The next prime is 133040881669. The reversal of 133040881656 is 656188040331.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133040881651) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 508135 + ... + 724073.

It is an arithmetic number, because the mean of its divisors is an integer number (3859927500).

Almost surely, 2^133040881656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 133040881656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (185276520000).

133040881656 is an abundant number, since it is smaller than the sum of its proper divisors (237512158344).

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

133040881656 is a wasteful number, since it uses less digits than its factorization.

133040881656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216193 (or 216186 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The spelling of 133040881656 in words is "one hundred thirty-three billion, forty million, eight hundred eighty-one thousand, six hundred fifty-six".