1581225833742 has 8 divisors (see below), whose sum is σ = 3162451667496. Its totient is φ = 527075277912.

The previous prime is 1581225833741. The next prime is 1581225833771. The reversal of 1581225833742 is 2473385221851.

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

1581225833742 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1581225833741) by changing a digit.

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, 131768819473 + ... + 131768819484.

It is an arithmetic number, because the mean of its divisors is an integer number (395306458437).

Almost surely, 2^{1581225833742} is an apocalyptic number.

1581225833742 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.

1581225833742 is a wasteful number, since it uses less digits than its factorization.

1581225833742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263537638962.

The product of its digits is 3225600, while the sum is 51.

The spelling of 1581225833742 in words is "one trillion, five hundred eighty-one billion, two hundred twenty-five million, eight hundred thirty-three thousand, seven hundred forty-two".