42378311853 has 12 divisors (see below), whose sum is σ = 61252655100. Its totient is φ = 28233959616.

The previous prime is 42378311837. The next prime is 42378311867. The reversal of 42378311853 is 35811387324.

It can be written as a sum of positive squares in 2 ways, for example, as 15514446249 + 26863865604 = 124557^2 + 163902^2 .

It is not a de Polignac number, because 42378311853 - 2⁴ = 42378311837 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42378311799 and 42378311808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42378311953) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1505976 + ... + 1533857.

It is an arithmetic number, because the mean of its divisors is an integer number (5104387925).

Almost surely, 2^42378311853 is an apocalyptic number.

It is an amenable number.

42378311853 is a deficient number, since it is larger than the sum of its proper divisors (18874343247).

42378311853 is a wasteful number, since it uses less digits than its factorization.

42378311853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3041388 (or 3041385 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The spelling of 42378311853 in words is "forty-two billion, three hundred seventy-eight million, three hundred eleven thousand, eight hundred fifty-three".