42646780045 has 8 divisors (see below), whose sum is σ = 51206374296. Its totient is φ = 34097265216.

The previous prime is 42646780039. The next prime is 42646780081. The reversal of 42646780045 is 54008764624.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 13862943081 + 28783836964 = 117741^2 + 169658^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42646780045 - 2⁹ = 42646779533 is a prime.

It is a super-2 number, since 2×42646780045² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42646779977 and 42646780004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2510542 + ... + 2527471.

It is an arithmetic number, because the mean of its divisors is an integer number (6400796787).

Almost surely, 2^42646780045 is an apocalyptic number.

It is an amenable number.

42646780045 is a deficient number, since it is larger than the sum of its proper divisors (8559594251).

42646780045 is a wasteful number, since it uses less digits than its factorization.

42646780045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5039711.

The product of its (nonzero) digits is 1290240, while the sum is 46.

The spelling of 42646780045 in words is "forty-two billion, six hundred forty-six million, seven hundred eighty thousand, forty-five".