133158831806 has 64 divisors (see below), whose sum is σ = 268444302336. Its totient is φ = 47842099200.

The previous prime is 133158831781. The next prime is 133158831847. The reversal of 133158831806 is 608138851331.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2031806 + ... + 2096318.

It is an arithmetic number, because the mean of its divisors is an integer number (4194442224).

Almost surely, 2^133158831806 is an apocalyptic number.

133158831806 is an abundant number, since it is smaller than the sum of its proper divisors (135285470530).

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

133158831806 is a wasteful number, since it uses less digits than its factorization.

133158831806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65577.

The product of its (nonzero) digits is 414720, while the sum is 47.

The spelling of 133158831806 in words is "one hundred thirty-three billion, one hundred fifty-eight million, eight hundred thirty-one thousand, eight hundred six".