42507969309 has 12 divisors (see below), whose sum is σ = 66123507996. Its totient is φ = 26158750272.

The previous prime is 42507969307. The next prime is 42507969323. The reversal of 42507969309 is 90396970524.

42507969309 is a `hidden beast` number, since 42 + 507 + 9 + 6 + 93 + 0 + 9 = 666.

42507969309 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 5424764409 + 37083204900 = 73653^2 + 192570^2 .

It is not a de Polignac number, because 42507969309 - 2¹ = 42507969307 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42507969307) 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, 181657872 + ... + 181658105.

It is an arithmetic number, because the mean of its divisors is an integer number (5510292333).

Almost surely, 2^42507969309 is an apocalyptic number.

It is an amenable number.

42507969309 is a deficient number, since it is larger than the sum of its proper divisors (23615538687).

42507969309 is a wasteful number, since it uses less digits than its factorization.

42507969309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363315996 (or 363315993 counting only the distinct ones).

The product of its (nonzero) digits is 3674160, while the sum is 54.

The spelling of 42507969309 in words is "forty-two billion, five hundred seven million, nine hundred sixty-nine thousand, three hundred nine".