1481388397129 has 9 divisors (see below), whose sum is σ = 1494752819079. Its totient is φ = 1468142447520.

The previous prime is 1481388397127. The next prime is 1481388397147. The reversal of 1481388397129 is 9217938831841.

The square root of 1481388397129 is 1217123.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 26103249225 + 1455285147904 = 161565^2 + 1206352^2 .

It is not a de Polignac number, because 1481388397129 - 2¹ = 1481388397127 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1481388397127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 137529514 + ... + 137540284.

Almost surely, 2^{1481388397129} is an apocalyptic number.

1481388397129 is the 1217123-rd square number.

1481388397129 is the 608562-nd centered octagonal number.

It is an amenable number.

1481388397129 is a deficient number, since it is larger than the sum of its proper divisors (13364421950).

1481388397129 is an frugal number, since it uses more digits than its factorization.

1481388397129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21768 (or 10884 counting only the distinct ones).

The product of its digits is 20901888, while the sum is 64.

Multiplying 1481388397129 by its sum of digits (64), we get a square (94808857416256 = 9736984²).

The spelling of 1481388397129 in words is "one trillion, four hundred eighty-one billion, three hundred eighty-eight million, three hundred ninety-seven thousand, one hundred twenty-nine".