2133826578 has 80 divisors (see below), whose sum is σ = 5420257920. Its totient is φ = 621994464.

The previous prime is 2133826571. The next prime is 2133826613. The reversal of 2133826578 is 8756283312.

2133826578 is a `hidden beast` number, since 21 + 3 + 38 + 26 + 578 = 666.

It is not an unprimeable number, because it can be changed into a prime (2133826571) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 13351 + ... + 66677.

It is an arithmetic number, because the mean of its divisors is an integer number (67753224).

Almost surely, 2^2133826578 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2133826578, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2710128960).

2133826578 is an abundant number, since it is smaller than the sum of its proper divisors (3286431342).

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

2133826578 is a wasteful number, since it uses less digits than its factorization.

2133826578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53373 (or 53364 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The square root of 2133826578 is about 46193.3607567148. The cubic root of 2133826578 is about 1287.4183848475.

The spelling of 2133826578 in words is "two billion, one hundred thirty-three million, eight hundred twenty-six thousand, five hundred seventy-eight".