4542121620389 has 2 divisors, whose sum is σ = 4542121620390. Its totient is φ = 4542121620388.

The previous prime is 4542121620373. The next prime is 4542121620397. The reversal of 4542121620389 is 9830261212454.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4356541596289 + 185580024100 = 2087233^2 + 430790^2 .

It is a cyclic number.

It is not a de Polignac number, because 4542121620389 - 2⁴ = 4542121620373 is a prime.

It is a super-2 number, since 2×4542121620389² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4542121620329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2271060810194 + 2271060810195.

It is an arithmetic number, because the mean of its divisors is an integer number (2271060810195).

Almost surely, 2^{4542121620389} is an apocalyptic number.

It is an amenable number.

4542121620389 is a deficient number, since it is larger than the sum of its proper divisors (1).

4542121620389 is an equidigital number, since it uses as much as digits as its factorization.

4542121620389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 829440, while the sum is 47.

The spelling of 4542121620389 in words is "four trillion, five hundred forty-two billion, one hundred twenty-one million, six hundred twenty thousand, three hundred eighty-nine".