133852807881 has 135 divisors (see below), whose sum is σ = 224483143269. Its totient is φ = 79447013568.

The previous prime is 133852807861. The next prime is 133852807897. The reversal of 133852807881 is 188708258331.

The square root of 133852807881 is 365859.

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

133852807881 is a `hidden beast` number, since 1 + 3 + 38 + 528 + 0 + 7 + 8 + 81 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 3474041481 + 130378766400 = 58941^2 + 361080^2 .

It is not a de Polignac number, because 133852807881 - 2⁵ = 133852807849 is a prime.

It is a super-2 number, since 2×133852807881² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (133852807801) by changing a digit.

It is a polite number, since it can be written in 134 ways as a sum of consecutive naturals, for example, 2268691630 + ... + 2268691688.

Almost surely, 2^133852807881 is an apocalyptic number.

133852807881 is the 365859-th square number.

133852807881 is the 182930-th centered octagonal number.

It is an amenable number.

133852807881 is a deficient number, since it is larger than the sum of its proper divisors (90630335388).

133852807881 is an frugal number, since it uses more digits than its factorization.

133852807881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262 (or 128 counting only the distinct ones).

The product of its (nonzero) digits is 2580480, while the sum is 54.

The spelling of 133852807881 in words is "one hundred thirty-three billion, eight hundred fifty-two million, eight hundred seven thousand, eight hundred eighty-one".