1518176372449 has 45 divisors (see below), whose sum is σ = 1776963003235. Its totient is φ = 1296805864640.

The previous prime is 1518176372411. The next prime is 1518176372459. The reversal of 1518176372449 is 9442736718151.

The square root of 1518176372449 is 1232143.

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., 1181971224225 + 336205148224 = 1087185^2 + 579832^2 .

It is not a de Polignac number, because 1518176372449 - 2¹⁵ = 1518176339681 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1518176372393 and 1518176372402.

It is not an unprimeable number, because it can be changed into a prime (1518176372459) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 2534517852 + ... + 2534518450.

Almost surely, 2^{1518176372449} is an apocalyptic number.

1518176372449 is the 1232143-rd square number.

1518176372449 is the 616072-nd centered octagonal number.

It is an amenable number.

1518176372449 is a deficient number, since it is larger than the sum of its proper divisors (258786630786).

1518176372449 is an frugal number, since it uses more digits than its factorization.

1518176372449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1276 (or 627 counting only the distinct ones).

The product of its digits is 10160640, while the sum is 58.

It can be divided in two parts, 1518176 and 372449, that added together give a square (1890625 = 1375²).

The spelling of 1518176372449 in words is "one trillion, five hundred eighteen billion, one hundred seventy-six million, three hundred seventy-two thousand, four hundred forty-nine".