42728826019441 has 3 divisors (see below), whose sum is σ = 42728832556171. Its totient is φ = 42728819482712.

The previous prime is 42728826019409. The next prime is 42728826019463. The reversal of 42728826019441 is 14491062882724.

It is a happy number.

The square root of 42728826019441 is 6536729.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 42102955165041 + 625870854400 = 6488679^2 + 791120^2 .

It is not a de Polignac number, because 42728826019441 - 2⁵ = 42728826019409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42728826019141) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 3268365 + ... + 9805093.

Almost surely, 2^{42728826019441} is an apocalyptic number.

42728826019441 is the 6536729-th square number.

42728826019441 is the 3268365-th centered octagonal number.

It is an amenable number.

42728826019441 is a deficient number, since it is larger than the sum of its proper divisors (6536730).

42728826019441 is an frugal number, since it uses more digits than its factorization.

42728826019441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13073458 (or 6536729 counting only the distinct ones).

The product of its (nonzero) digits is 12386304, while the sum is 58.

The spelling of 42728826019441 in words is "forty-two trillion, seven hundred twenty-eight billion, eight hundred twenty-six million, nineteen thousand, four hundred forty-one".