1538740315547 has 4 divisors (see below), whose sum is σ = 1539346359960. Its totient is φ = 1538134271136.

The previous prime is 1538740315487. The next prime is 1538740315603. The reversal of 1538740315547 is 7455130478351.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1538740315547 - 2¹⁰ = 1538740314523 is a prime.

It is a super-2 number, since 2×1538740315547² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1538740315447) 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 in 3 ways as a sum of consecutive naturals, for example, 303018398 + ... + 303023475.

It is an arithmetic number, because the mean of its divisors is an integer number (384836589990).

Almost surely, 2^{1538740315547} is an apocalyptic number.

1538740315547 is a deficient number, since it is larger than the sum of its proper divisors (606044413).

1538740315547 is an equidigital number, since it uses as much as digits as its factorization.

1538740315547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606044412.

The product of its (nonzero) digits is 7056000, while the sum is 53.

The spelling of 1538740315547 in words is "one trillion, five hundred thirty-eight billion, seven hundred forty million, three hundred fifteen thousand, five hundred forty-seven".