42648978485 has 4 divisors (see below), whose sum is σ = 51178774188. Its totient is φ = 34119182784.

The previous prime is 42648978481. The next prime is 42648978503. The reversal of 42648978485 is 58487984624.

42648978485 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12387244804 + 30261733681 = 111298^2 + 173959^2 .

It is a cyclic number.

It is not a de Polignac number, because 42648978485 - 2² = 42648978481 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 (42648978481) 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, 4264897844 + ... + 4264897853.

It is an arithmetic number, because the mean of its divisors is an integer number (12794693547).

Almost surely, 2^42648978485 is an apocalyptic number.

It is an amenable number.

42648978485 is a deficient number, since it is larger than the sum of its proper divisors (8529795703).

42648978485 is an equidigital number, since it uses as much as digits as its factorization.

42648978485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8529795702.

The product of its digits is 123863040, while the sum is 65.

The spelling of 42648978485 in words is "forty-two billion, six hundred forty-eight million, nine hundred seventy-eight thousand, four hundred eighty-five".