1581013306427 has 4 divisors (see below), whose sum is σ = 1674014089176. Its totient is φ = 1488012523680.

The previous prime is 1581013306423. The next prime is 1581013306501. The reversal of 1581013306427 is 7246033101851.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1581013306427 - 2² = 1581013306423 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1581013306421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46500391349 + ... + 46500391382.

It is an arithmetic number, because the mean of its divisors is an integer number (418503522294).

Almost surely, 2^{1581013306427} is an apocalyptic number.

1581013306427 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

1581013306427 is a deficient number, since it is larger than the sum of its proper divisors (93000782749).

1581013306427 is an equidigital number, since it uses as much as digits as its factorization.

1581013306427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93000782748.

The product of its (nonzero) digits is 120960, while the sum is 41.

The spelling of 1581013306427 in words is "one trillion, five hundred eighty-one billion, thirteen million, three hundred six thousand, four hundred twenty-seven".