42049478989 has 4 divisors (see below), whose sum is σ = 48056547424. Its totient is φ = 36042410556.

The previous prime is 42049478953. The next prime is 42049479013. The reversal of 42049478989 is 98987494024.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42049478989 - 2¹⁵ = 42049446221 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42049478989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42049478789) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3003534207 + ... + 3003534220.

It is an arithmetic number, because the mean of its divisors is an integer number (12014136856).

Almost surely, 2^42049478989 is an apocalyptic number.

It is an amenable number.

42049478989 is a deficient number, since it is larger than the sum of its proper divisors (6007068435).

42049478989 is an equidigital number, since it uses as much as digits as its factorization.

42049478989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6007068434.

The product of its (nonzero) digits is 41803776, while the sum is 64.

The spelling of 42049478989 in words is "forty-two billion, forty-nine million, four hundred seventy-eight thousand, nine hundred eighty-nine".