133249821156 has 81 divisors (see below), whose sum is σ = 341398728489. Its totient is φ = 43821601632.

The previous prime is 133249821091. The next prime is 133249821169. The reversal of 133249821156 is 651128942331.

The square root of 133249821156 is 365034.

It is a perfect power (a square), and thus also a powerful number.

133249821156 is a `hidden beast` number, since 1 + 3 + 3 + 2 + 498 + 2 + 1 + 156 = 666.

It can be written as a sum of positive squares in only one way, i.e., 130357102500 + 2892718656 = 361050^2 + 53784^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 181786566 + ... + 181787298.

Almost surely, 2^133249821156 is an apocalyptic number.

133249821156 is the 365034-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 133249821156

133249821156 is an abundant number, since it is smaller than the sum of its proper divisors (208148907333).

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

133249821156 is an frugal number, since it uses more digits than its factorization.

133249821156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1642 (or 821 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The spelling of 133249821156 in words is "one hundred thirty-three billion, two hundred forty-nine million, eight hundred twenty-one thousand, one hundred fifty-six".