1881608139623 has 2 divisors, whose sum is σ = 1881608139624. Its totient is φ = 1881608139622.

The previous prime is 1881608139589. The next prime is 1881608139629. The reversal of 1881608139623 is 3269318061881.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1881608139623 - 2⁶ = 1881608139559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1881608139629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 940804069811 + 940804069812.

It is an arithmetic number, because the mean of its divisors is an integer number (940804069812).

Almost surely, 2^{1881608139623} is an apocalyptic number.

1881608139623 is a deficient number, since it is larger than the sum of its proper divisors (1).

1881608139623 is an equidigital number, since it uses as much as digits as its factorization.

1881608139623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2985984, while the sum is 56.

The spelling of 1881608139623 in words is "one trillion, eight hundred eighty-one billion, six hundred eight million, one hundred thirty-nine thousand, six hundred twenty-three".