1581422064407 has 4 divisors (see below), whose sum is σ = 1581425121816. Its totient is φ = 1581419007000.

The previous prime is 1581422064401. The next prime is 1581422064419. The reversal of 1581422064407 is 7044602241851.

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 1581422064407 - 2¹⁴ = 1581422048023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1581422064401) 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, 539453 + ... + 1858454.

It is an arithmetic number, because the mean of its divisors is an integer number (395356280454).

Almost surely, 2^{1581422064407} is an apocalyptic number.

1581422064407 is a deficient number, since it is larger than the sum of its proper divisors (3057409).

1581422064407 is an equidigital number, since it uses as much as digits as its factorization.

1581422064407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3057408.

The product of its (nonzero) digits is 430080, while the sum is 44.

The spelling of 1581422064407 in words is "one trillion, five hundred eighty-one billion, four hundred twenty-two million, sixty-four thousand, four hundred seven".