42073172788 has 12 divisors (see below), whose sum is σ = 73630837252. Its totient is φ = 21035790720.

The previous prime is 42073172777. The next prime is 42073172803. The reversal of 42073172788 is 88727137024.

42073172788 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 6317388324 + 35755784464 = 79482^2 + 189092^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70773 + ... + 298588.

Almost surely, 2^42073172788 is an apocalyptic number.

It is an amenable number.

42073172788 is a deficient number, since it is larger than the sum of its proper divisors (31557664464).

42073172788 is a wasteful number, since it uses less digits than its factorization.

42073172788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397842 (or 397840 counting only the distinct ones).

The product of its (nonzero) digits is 1053696, while the sum is 49.

The spelling of 42073172788 in words is "forty-two billion, seventy-three million, one hundred seventy-two thousand, seven hundred eighty-eight".