38940880509 has 6 divisors (see below), whose sum is σ = 56247938526. Its totient is φ = 25960587000.

The previous prime is 38940880501. The next prime is 38940880523. The reversal of 38940880509 is 90508804983.

It is a happy number.

38940880509 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 only one way, i.e., 31462954884 + 7477925625 = 177378^2 + 86475^2 .

It is not a de Polignac number, because 38940880509 - 2³ = 38940880501 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38940880501) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2163382242 + ... + 2163382259.

It is an arithmetic number, because the mean of its divisors is an integer number (9374656421).

Almost surely, 2^38940880509 is an apocalyptic number.

It is an amenable number.

38940880509 is a deficient number, since it is larger than the sum of its proper divisors (17307058017).

38940880509 is a wasteful number, since it uses less digits than its factorization.

38940880509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4326764507 (or 4326764504 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 54.

The spelling of 38940880509 in words is "thirty-eight billion, nine hundred forty million, eight hundred eighty thousand, five hundred nine".