13561164466420 has 12 divisors (see below), whose sum is σ = 28478445379524. Its totient is φ = 5424465786560.

The previous prime is 13561164466393. The next prime is 13561164466439. The reversal of 13561164466420 is 2466446116531.

It can be written as a sum of positive squares in 2 ways, for example, as 5099837591524 + 8461326874896 = 2258282^2 + 2908836^2 .

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 3 ways as a sum of consecutive naturals, for example, 339029111641 + ... + 339029111680.

It is an arithmetic number, because the mean of its divisors is an integer number (2373203781627).

Almost surely, 2^{13561164466420} is an apocalyptic number.

13561164466420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13561164466420 is an abundant number, since it is smaller than the sum of its proper divisors (14917280913104).

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

13561164466420 is a wasteful number, since it uses less digits than its factorization.

13561164466420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 678058223330 (or 678058223328 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 49.

The spelling of 13561164466420 in words is "thirteen trillion, five hundred sixty-one billion, one hundred sixty-four million, four hundred sixty-six thousand, four hundred twenty".