426491281969 has 9 divisors (see below), whose sum is σ = 428000596779. Its totient is φ = 424987277880.

The previous prime is 426491281961. The next prime is 426491281981. The reversal of 426491281969 is 969182194624.

The square root of 426491281969 is 653063.

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., 91727208225 + 334764073744 = 302865^2 + 578588^2 .

It is not a de Polignac number, because 426491281969 - 2³ = 426491281961 is a prime.

It is a super-2 number, since 2×426491281969² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

Its product of digits (13436928) is a multiple of the sum of its prime divisors (2304).

It is not an unprimeable number, because it can be changed into a prime (426491281961) 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, 216162867 + ... + 216164839.

Almost surely, 2^426491281969 is an apocalyptic number.

426491281969 is the 653063-rd square number.

426491281969 is the 326532-nd centered octagonal number.

It is an amenable number.

426491281969 is a deficient number, since it is larger than the sum of its proper divisors (1509314810).

426491281969 is an frugal number, since it uses more digits than its factorization.

426491281969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4608 (or 2304 counting only the distinct ones).

The product of its digits is 13436928, while the sum is 61.

The spelling of 426491281969 in words is "four hundred twenty-six billion, four hundred ninety-one million, two hundred eighty-one thousand, nine hundred sixty-nine".