1561641221214 has 24 divisors (see below), whose sum is σ = 3455546533920. Its totient is φ = 509471603808.

The previous prime is 1561641221209. The next prime is 1561641221221. The reversal of 1561641221214 is 4121221461651.

1561641221214 is a `hidden beast` number, since 1 + 5 + 6 + 1 + 6 + 412 + 21 + 214 = 666.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 922954959 + ... + 922956650.

It is an arithmetic number, because the mean of its divisors is an integer number (143981105580).

Almost surely, 2^{1561641221214} is an apocalyptic number.

1561641221214 is an abundant number, since it is smaller than the sum of its proper divisors (1893905312706).

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

1561641221214 is a wasteful number, since it uses less digits than its factorization.

1561641221214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1845911664 (or 1845911661 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

Adding to 1561641221214 its reverse (4121221461651), we get a palindrome (5682862682865).

The spelling of 1561641221214 in words is "one trillion, five hundred sixty-one billion, six hundred forty-one million, two hundred twenty-one thousand, two hundred fourteen".