53449278481 has 9 divisors (see below), whose sum is σ = 54208606971. Its totient is φ = 52700450832.

The previous prime is 53449278439. The next prime is 53449278517. The reversal of 53449278481 is 18487294435.

The square root of 53449278481 is 231191.

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., 30340414225 + 23108864256 = 174185^2 + 152016^2 .

It is not a de Polignac number, because 53449278481 - 2²¹ = 53447181329 is a prime.

It is a super-2 number, since 2×53449278481² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53449278431) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 16875360 + ... + 16878526.

Almost surely, 2^53449278481 is an apocalyptic number.

53449278481 is the 231191-st square number.

53449278481 is the 115596-th centered octagonal number.

It is an amenable number.

53449278481 is a deficient number, since it is larger than the sum of its proper divisors (759328490).

53449278481 is an frugal number, since it uses more digits than its factorization.

53449278481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6480 (or 3240 counting only the distinct ones).

The product of its digits is 7741440, while the sum is 55.

The spelling of 53449278481 in words is "fifty-three billion, four hundred forty-nine million, two hundred seventy-eight thousand, four hundred eighty-one".