42655228023409 has 3 divisors (see below), whose sum is σ = 42655234554507. Its totient is φ = 42655221492312.

The previous prime is 42655228023283. The next prime is 42655228023433. The reversal of 42655228023409 is 90432082255624.

The square root of 42655228023409 is 6531097.

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., 30938791930225 + 11716436093184 = 5562265^2 + 3422928^2 .

It is not a de Polignac number, because 42655228023409 - 2¹³ = 42655228015217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42655228023439) 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, 3265549 + ... + 9796645.

It is an arithmetic number, because the mean of its divisors is an integer number (14218411518169).

Almost surely, 2^{42655228023409} is an apocalyptic number.

42655228023409 is the 6531097-th square number.

42655228023409 is the 3265549-th centered octagonal number.

It is an amenable number.

42655228023409 is a deficient number, since it is larger than the sum of its proper divisors (6531098).

42655228023409 is an frugal number, since it uses more digits than its factorization.

42655228023409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13062194 (or 6531097 counting only the distinct ones).

The product of its (nonzero) digits is 8294400, while the sum is 52.

The spelling of 42655228023409 in words is "forty-two trillion, six hundred fifty-five billion, two hundred twenty-eight million, twenty-three thousand, four hundred nine".