1542544451939 has 2 divisors, whose sum is σ = 1542544451940. Its totient is φ = 1542544451938.

The previous prime is 1542544451897. The next prime is 1542544451977. The reversal of 1542544451939 is 9391544452451.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1542544451939 - 2²⁰ = 1542543403363 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1542544451039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 771272225969 + 771272225970.

It is an arithmetic number, because the mean of its divisors is an integer number (771272225970).

Almost surely, 2^{1542544451939} is an apocalyptic number.

1542544451939 is a deficient number, since it is larger than the sum of its proper divisors (1).

1542544451939 is an equidigital number, since it uses as much as digits as its factorization.

1542544451939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552000, while the sum is 56.

The spelling of 1542544451939 in words is "one trillion, five hundred forty-two billion, five hundred forty-four million, four hundred fifty-one thousand, nine hundred thirty-nine".