138928900465 has 8 divisors (see below), whose sum is σ = 167560949160. Its totient is φ = 110578941312.

The previous prime is 138928900457. The next prime is 138928900501. The reversal of 138928900465 is 564009829831.

It can be written as a sum of positive squares in 4 ways, for example, as 29383787889 + 109545112576 = 171417^2 + 330976^2 .

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 138928900465 - 2³ = 138928900457 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70521300 + ... + 70523269.

It is an arithmetic number, because the mean of its divisors is an integer number (20945118645).

Almost surely, 2^138928900465 is an apocalyptic number.

It is an amenable number.

138928900465 is a deficient number, since it is larger than the sum of its proper divisors (28632048695).

138928900465 is a wasteful number, since it uses less digits than its factorization.

138928900465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141044771.

The product of its (nonzero) digits is 3732480, while the sum is 55.

The spelling of 138928900465 in words is "one hundred thirty-eight billion, nine hundred twenty-eight million, nine hundred thousand, four hundred sixty-five".