268003971481 has 9 divisors (see below), whose sum is σ = 268882251519. Its totient is φ = 267128556000.

The previous prime is 268003971467. The next prime is 268003971491. The reversal of 268003971481 is 184179300862.

The square root of 268003971481 is 517691.

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., 265337281881 + 2666689600 = 515109^2 + 51640^2 .

It is not a de Polignac number, because 268003971481 - 2²³ = 267995582873 is a prime.

It is a super-2 number, since 2×268003971481² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (268003971491) 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, 207593446 + ... + 207594736.

Almost surely, 2^268003971481 is an apocalyptic number.

268003971481 is the 517691-st square number.

268003971481 is the 258846-th centered octagonal number.

It is an amenable number.

268003971481 is a deficient number, since it is larger than the sum of its proper divisors (878280038).

268003971481 is an frugal number, since it uses more digits than its factorization.

268003971481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3384 (or 1692 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 49.

Multiplying 268003971481 by its sum of digits (49), we get a square (13132194602569 = 3623837²).

The spelling of 268003971481 in words is "two hundred sixty-eight billion, three million, nine hundred seventy-one thousand, four hundred eighty-one".