1538229734551 has 2 divisors, whose sum is σ = 1538229734552. Its totient is φ = 1538229734550.

The previous prime is 1538229734543. The next prime is 1538229734557. The reversal of 1538229734551 is 1554379228351.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (1554379228351) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1538229734551 - 2³ = 1538229734543 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1538229734492 and 1538229734501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1538229734557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 769114867275 + 769114867276.

It is an arithmetic number, because the mean of its divisors is an integer number (769114867276).

Almost surely, 2^{1538229734551} is an apocalyptic number.

1538229734551 is a deficient number, since it is larger than the sum of its proper divisors (1).

1538229734551 is an equidigital number, since it uses as much as digits as its factorization.

1538229734551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072000, while the sum is 55.

The spelling of 1538229734551 in words is "one trillion, five hundred thirty-eight billion, two hundred twenty-nine million, seven hundred thirty-four thousand, five hundred fifty-one".