1581422064419 has 2 divisors, whose sum is σ = 1581422064420. Its totient is φ = 1581422064418.

The previous prime is 1581422064401. The next prime is 1581422064433. The reversal of 1581422064419 is 9144602241851.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1581422064419 is a prime.

It is a super-2 number, since 2×1581422064419² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1581422060419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 790711032209 + 790711032210.

It is an arithmetic number, because the mean of its divisors is an integer number (790711032210).

Almost surely, 2^{1581422064419} is an apocalyptic number.

1581422064419 is a deficient number, since it is larger than the sum of its proper divisors (1).

1581422064419 is an equidigital number, since it uses as much as digits as its factorization.

1581422064419 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 552960, while the sum is 47.

The spelling of 1581422064419 in words is "one trillion, five hundred eighty-one billion, four hundred twenty-two million, sixty-four thousand, four hundred nineteen".