1020542419549 has 2 divisors, whose sum is σ = 1020542419550. Its totient is φ = 1020542419548.

The previous prime is 1020542419511. The next prime is 1020542419571. The reversal of 1020542419549 is 9459142450201.

1020542419549 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1011820727449 + 8721692100 = 1005893^2 + 93390^2 .

It is a cyclic number.

It is not a de Polignac number, because 1020542419549 - 2⁹ = 1020542419037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1020542419499 and 1020542419508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1020542419249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510271209774 + 510271209775.

It is an arithmetic number, because the mean of its divisors is an integer number (510271209775).

Almost surely, 2^{1020542419549} is an apocalyptic number.

It is an amenable number.

1020542419549 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020542419549 is an equidigital number, since it uses as much as digits as its factorization.

1020542419549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 518400, while the sum is 46.

The spelling of 1020542419549 in words is "one trillion, twenty billion, five hundred forty-two million, four hundred nineteen thousand, five hundred forty-nine".