13404561831906 has 16 divisors (see below), whose sum is σ = 30638998473024. Its totient is φ = 3829874809104.

The previous prime is 13404561831901. The next prime is 13404561831911. The reversal of 13404561831906 is 60913816540431.

It is an interprime number because it is at equal distance from previous prime (13404561831901) and next prime (13404561831911).

It is a super-2 number, since 2×13404561831906² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13404561831901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 159578117005 + ... + 159578117088.

It is an arithmetic number, because the mean of its divisors is an integer number (1914937404564).

Almost surely, 2^{13404561831906} is an apocalyptic number.

13404561831906 is an abundant number, since it is smaller than the sum of its proper divisors (17234436641118).

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

13404561831906 is a wasteful number, since it uses less digits than its factorization.

13404561831906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319156234105.

The product of its (nonzero) digits is 1866240, while the sum is 51.

The spelling of 13404561831906 in words is "thirteen trillion, four hundred four billion, five hundred sixty-one million, eight hundred thirty-one thousand, nine hundred six".