53447428969 has 9 divisors (see below), whose sum is σ = 58750795831. Its totient is φ = 48586259920.

The previous prime is 53447428927. The next prime is 53447428999. The reversal of 53447428969 is 96982474435.

It is a happy number.

The square root of 53447428969 is 231187.

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., 45765225 + 53401663744 = 6765^2 + 231088^2 .

It is not a de Polignac number, because 53447428969 - 2⁷ = 53447428841 is a prime.

It is a super-2 number, since 2×53447428969² (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 (53447428999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2532549 + ... + 2553565.

Almost surely, 2^53447428969 is an apocalyptic number.

53447428969 is the 231187-th square number.

53447428969 is the 115594-th centered octagonal number.

It is an amenable number.

53447428969 is a deficient number, since it is larger than the sum of its proper divisors (5303366862).

53447428969 is an frugal number, since it uses more digits than its factorization.

53447428969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42056 (or 21028 counting only the distinct ones).

The product of its digits is 52254720, while the sum is 61.

The spelling of 53447428969 in words is "fifty-three billion, four hundred forty-seven million, four hundred twenty-eight thousand, nine hundred sixty-nine".