133812581379 has 16 divisors (see below), whose sum is σ = 187863511680. Its totient is φ = 84487838400.

The previous prime is 133812581293. The next prime is 133812581381. The reversal of 133812581379 is 973185218331.

It is not a de Polignac number, because 133812581379 - 2¹⁹ = 133812057091 is a prime.

It is a super-2 number, since 2×133812581379² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (133812581479) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 159922 + ... + 541479.

It is an arithmetic number, because the mean of its divisors is an integer number (11741469480).

Almost surely, 2^133812581379 is an apocalyptic number.

133812581379 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

133812581379 is a deficient number, since it is larger than the sum of its proper divisors (54050930301).

133812581379 is a wasteful number, since it uses less digits than its factorization.

133812581379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 704770.

The product of its digits is 1088640, while the sum is 51.

The spelling of 133812581379 in words is "one hundred thirty-three billion, eight hundred twelve million, five hundred eighty-one thousand, three hundred seventy-nine".