1542945553 has 2 divisors, whose sum is σ = 1542945554. Its totient is φ = 1542945552.

The previous prime is 1542945539. The next prime is 1542945587. The reversal of 1542945553 is 3555492451.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1536012864 + 6932689 = 39192^2 + 2633^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1542945553 is a prime.

It is not a weakly prime, because it can be changed into another prime (1542945953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 771472776 + 771472777.

It is an arithmetic number, because the mean of its divisors is an integer number (771472777).

Almost surely, 2^1542945553 is an apocalyptic number.

It is an amenable number.

1542945553 is a deficient number, since it is larger than the sum of its proper divisors (1).

1542945553 is an equidigital number, since it uses as much as digits as its factorization.

1542945553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 540000, while the sum is 43.

The square root of 1542945553 is about 39280.3456323897. The cubic root of 1542945553 is about 1155.5361423353.

The spelling of 1542945553 in words is "one billion, five hundred forty-two million, nine hundred forty-five thousand, five hundred fifty-three".