13561247304220 has 96 divisors (see below), whose sum is σ = 37594388321280. Its totient is φ = 3978242135040.

The previous prime is 13561247304217. The next prime is 13561247304239. The reversal of 13561247304220 is 2240374216531.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 258973960 + ... + 259026319.

It is an arithmetic number, because the mean of its divisors is an integer number (391608211680).

Almost surely, 2^{13561247304220} is an apocalyptic number.

13561247304220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13561247304220 is an abundant number, since it is smaller than the sum of its proper divisors (24033141017060).

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

13561247304220 is a wasteful number, since it uses less digits than its factorization.

13561247304220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518000323 (or 518000321 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 40.

The spelling of 13561247304220 in words is "thirteen trillion, five hundred sixty-one billion, two hundred forty-seven million, three hundred four thousand, two hundred twenty".