1421655343529 has 2 divisors, whose sum is σ = 1421655343530. Its totient is φ = 1421655343528.

The previous prime is 1421655343513. The next prime is 1421655343543. The reversal of 1421655343529 is 9253435561241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1384921787929 + 36733555600 = 1176827^2 + 191660^2 .

It is a cyclic number.

It is not a de Polignac number, because 1421655343529 - 2⁴ = 1421655343513 is a prime.

It is a super-2 number, since 2×1421655343529² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1421655343429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710827671764 + 710827671765.

It is an arithmetic number, because the mean of its divisors is an integer number (710827671765).

Almost surely, 2^{1421655343529} is an apocalyptic number.

It is an amenable number.

1421655343529 is a deficient number, since it is larger than the sum of its proper divisors (1).

1421655343529 is an equidigital number, since it uses as much as digits as its factorization.

1421655343529 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3888000, while the sum is 50.

The spelling of 1421655343529 in words is "one trillion, four hundred twenty-one billion, six hundred fifty-five million, three hundred forty-three thousand, five hundred twenty-nine".