1561235063164 has 12 divisors (see below), whose sum is σ = 3122470126384. Its totient is φ = 669100741344.

The previous prime is 1561235063153. The next prime is 1561235063173. The reversal of 1561235063164 is 4613605321651.

1561235063164 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 1561235063164.

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, 27879197529 + ... + 27879197584.

Almost surely, 2^{1561235063164} is an apocalyptic number.

1561235063164 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1561235063164 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1561235063164 is a wasteful number, since it uses less digits than its factorization.

1561235063164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55758395124 (or 55758395122 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 43.

The spelling of 1561235063164 in words is "one trillion, five hundred sixty-one billion, two hundred thirty-five million, sixty-three thousand, one hundred sixty-four".