13501643578242 has 32 divisors (see below), whose sum is σ = 27042422158080. Its totient is φ = 4494027171840.

The previous prime is 13501643578219. The next prime is 13501643578253. The reversal of 13501643578242 is 24287534610531.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30058567 + ... + 30504437.

It is an arithmetic number, because the mean of its divisors is an integer number (845075692440).

Almost surely, 2^{13501643578242} is an apocalyptic number.

13501643578242 is an abundant number, since it is smaller than the sum of its proper divisors (13540778579838).

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

13501643578242 is a wasteful number, since it uses less digits than its factorization.

13501643578242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 453178.

The product of its (nonzero) digits is 4838400, while the sum is 51.

The spelling of 13501643578242 in words is "thirteen trillion, five hundred one billion, six hundred forty-three million, five hundred seventy-eight thousand, two hundred forty-two".