1542366331681 has 8 divisors (see below), whose sum is σ = 1762920435584. Its totient is φ = 1321866241920.

The previous prime is 1542366331661. The next prime is 1542366331703. The reversal of 1542366331681 is 1861336632451.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1542366331681 - 2¹¹ = 1542366329633 is a prime.

It is a super-2 number, since 2×1542366331681² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1542366331661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13442325 + ... + 13556578.

It is an arithmetic number, because the mean of its divisors is an integer number (220365054448).

Almost surely, 2^{1542366331681} is an apocalyptic number.

It is an amenable number.

1542366331681 is a deficient number, since it is larger than the sum of its proper divisors (220554103903).

1542366331681 is an equidigital number, since it uses as much as digits as its factorization.

1542366331681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27007071.

The product of its digits is 1866240, while the sum is 49.

The spelling of 1542366331681 in words is "one trillion, five hundred forty-two billion, three hundred sixty-six million, three hundred thirty-one thousand, six hundred eighty-one".