1542514427561 has 2 divisors, whose sum is σ = 1542514427562. Its totient is φ = 1542514427560.

The previous prime is 1542514427533. The next prime is 1542514427563. The reversal of 1542514427561 is 1657244152451.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1230726203161 + 311788224400 = 1109381^2 + 558380^2 .

It is a cyclic number.

It is not a de Polignac number, because 1542514427561 - 2³⁸ = 1267636520617 is a prime.

Together with 1542514427563, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1542514427563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 771257213780 + 771257213781.

It is an arithmetic number, because the mean of its divisors is an integer number (771257213781).

Almost surely, 2^{1542514427561} is an apocalyptic number.

It is an amenable number.

1542514427561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1542514427561 is an equidigital number, since it uses as much as digits as its factorization.

1542514427561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1344000, while the sum is 47.

The spelling of 1542514427561 in words is "one trillion, five hundred forty-two billion, five hundred fourteen million, four hundred twenty-seven thousand, five hundred sixty-one".