15818350518441 has 27 divisors (see below), whose sum is σ = 23885758197847. Its totient is φ = 10086889100640.

The previous prime is 15818350518427. The next prime is 15818350518469. The reversal of 15818350518441 is 14481505381851.

The square root of 15818350518441 is 3977229.

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

15818350518441 is a `hidden beast` number, since 1 + 5 + 8 + 1 + 83 + 5 + 0 + 518 + 4 + 41 = 666.

It can be written as a sum of positive squares in only one way, i.e., 197517136041 + 15620833382400 = 444429^2 + 3952320^2 .

It is not a de Polignac number, because 15818350518441 - 2¹¹ = 15818350516393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15818350528441) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 274399981 + ... + 274457621.

Almost surely, 2^{15818350518441} is an apocalyptic number.

15818350518441 is the 3977229-th square number.

15818350518441 is the 1988615-th centered octagonal number.

It is an amenable number.

15818350518441 is a deficient number, since it is larger than the sum of its proper divisors (8067407679406).

15818350518441 is an frugal number, since it uses more digits than its factorization.

15818350518441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115334 (or 57667 counting only the distinct ones).

The product of its (nonzero) digits is 3072000, while the sum is 54.

The spelling of 15818350518441 in words is "fifteen trillion, eight hundred eighteen billion, three hundred fifty million, five hundred eighteen thousand, four hundred forty-one".