1368561268581 has 16 divisors (see below), whose sum is σ = 1966186965120. Its totient is φ = 841731543360.

The previous prime is 1368561268567. The next prime is 1368561268601. The reversal of 1368561268581 is 1858621658631.

It is not a de Polignac number, because 1368561268581 - 2⁹ = 1368561268069 is a prime.

It is a super-2 number, since 2×1368561268581² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1368561268511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9511146 + ... + 9653963.

It is an arithmetic number, because the mean of its divisors is an integer number (122886685320).

Almost surely, 2^{1368561268581} is an apocalyptic number.

It is an amenable number.

1368561268581 is a deficient number, since it is larger than the sum of its proper divisors (597625696539).

1368561268581 is a wasteful number, since it uses less digits than its factorization.

1368561268581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19166956.

The product of its digits is 16588800, while the sum is 60.

The spelling of 1368561268581 in words is "one trillion, three hundred sixty-eight billion, five hundred sixty-one million, two hundred sixty-eight thousand, five hundred eighty-one".