1621434027067 has 2 divisors, whose sum is σ = 1621434027068. Its totient is φ = 1621434027066.

The previous prime is 1621434026977. The next prime is 1621434027107. The reversal of 1621434027067 is 7607204341261.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1621434027067 is a prime.

It is not a weakly prime, because it can be changed into another prime (1621434025067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 810717013533 + 810717013534.

It is an arithmetic number, because the mean of its divisors is an integer number (810717013534).

Almost surely, 2^{1621434027067} is an apocalyptic number.

1621434027067 is a deficient number, since it is larger than the sum of its proper divisors (1).

1621434027067 is an equidigital number, since it uses as much as digits as its factorization.

1621434027067 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 338688, while the sum is 43.

The spelling of 1621434027067 in words is "one trillion, six hundred twenty-one billion, four hundred thirty-four million, twenty-seven thousand, sixty-seven".