133531501906 has 16 divisors (see below), whose sum is σ = 220961221920. Its totient is φ = 60014157280.

The previous prime is 133531501871. The next prime is 133531501913. The reversal of 133531501906 is 609105135331.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34096996 + ... + 34100911.

It is an arithmetic number, because the mean of its divisors is an integer number (13810076370).

Almost surely, 2^133531501906 is an apocalyptic number.

133531501906 is a deficient number, since it is larger than the sum of its proper divisors (87429720014).

133531501906 is a wasteful number, since it uses less digits than its factorization.

133531501906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68198009.

The product of its (nonzero) digits is 36450, while the sum is 37.

The spelling of 133531501906 in words is "one hundred thirty-three billion, five hundred thirty-one million, five hundred one thousand, nine hundred six".