42033206781 has 12 divisors (see below), whose sum is σ = 60912403552. Its totient is φ = 27930858696.

The previous prime is 42033206771. The next prime is 42033206797. The reversal of 42033206781 is 18760233024.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-42033206781 is a prime.

It is a super-2 number, since 2×42033206781² (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 (42033206711) 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, 7603681 + ... + 7609206.

Almost surely, 2^42033206781 is an apocalyptic number.

It is an amenable number.

42033206781 is a deficient number, since it is larger than the sum of its proper divisors (18879196771).

42033206781 is a wasteful number, since it uses less digits than its factorization.

42033206781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15213200 (or 15213197 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The spelling of 42033206781 in words is "forty-two billion, thirty-three million, two hundred six thousand, seven hundred eighty-one".