138280949465 has 8 divisors (see below), whose sum is σ = 165953432448. Its totient is φ = 110613897520.

The previous prime is 138280949453. The next prime is 138280949533. The reversal of 138280949465 is 564949082831.

It is a happy number.

138280949465 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 138280949465 - 2¹⁴ = 138280933081 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1301531 + ... + 1403760.

It is an arithmetic number, because the mean of its divisors is an integer number (20744179056).

Almost surely, 2^138280949465 is an apocalyptic number.

It is an amenable number.

138280949465 is a deficient number, since it is larger than the sum of its proper divisors (27672482983).

138280949465 is a wasteful number, since it uses less digits than its factorization.

138280949465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2715519.

The product of its (nonzero) digits is 14929920, while the sum is 59.

The spelling of 138280949465 in words is "one hundred thirty-eight billion, two hundred eighty million, nine hundred forty-nine thousand, four hundred sixty-five".