42178692069 has 12 divisors (see below), whose sum is σ = 61552869196. Its totient is φ = 27829239552.

The previous prime is 42178692043. The next prime is 42178692077. The reversal of 42178692069 is 96029687124.

42178692069 is a `hidden beast` number, since 421 + 7 + 8 + 6 + 9 + 206 + 9 = 666.

42178692069 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 8189345025 + 33989347044 = 90495^2 + 184362^2 .

It is not a de Polignac number, because 42178692069 - 2⁷ = 42178691941 is a prime.

It is a super-2 number, since 2×42178692069² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42178692019) 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, 24156454 + ... + 24158199.

Almost surely, 2^42178692069 is an apocalyptic number.

It is an amenable number.

42178692069 is a deficient number, since it is larger than the sum of its proper divisors (19374177127).

42178692069 is a wasteful number, since it uses less digits than its factorization.

42178692069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48314756 (or 48314753 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 54.

The spelling of 42178692069 in words is "forty-two billion, one hundred seventy-eight million, six hundred ninety-two thousand, sixty-nine".