42820613989 has 8 divisors (see below), whose sum is σ = 43634038392. Its totient is φ = 42007392960.

The previous prime is 42820613977. The next prime is 42820613993. The reversal of 42820613989 is 98931602824.

It can be written as a sum of positive squares in 4 ways, for example, as 819390625 + 42001223364 = 28625^2 + 204942^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42820613989 - 2¹³ = 42820605797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42820613089) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 414259 + ... + 507199.

It is an arithmetic number, because the mean of its divisors is an integer number (5454254799).

Almost surely, 2^42820613989 is an apocalyptic number.

It is an amenable number.

42820613989 is a deficient number, since it is larger than the sum of its proper divisors (813424403).

42820613989 is an equidigital number, since it uses as much as digits as its factorization.

42820613989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101687.

The product of its (nonzero) digits is 1492992, while the sum is 52.

The spelling of 42820613989 in words is "forty-two billion, eight hundred twenty million, six hundred thirteen thousand, nine hundred eighty-nine".