138587205465 has 24 divisors (see below), whose sum is σ = 247966787328. Its totient is φ = 71528879520.

The previous prime is 138587205457. The next prime is 138587205473. The reversal of 138587205465 is 564502785831.

138587205465 is a `hidden beast` number, since 1 + 3 + 8 + 587 + 2 + 0 + 54 + 6 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (138587205457) and next prime (138587205473).

It is not a de Polignac number, because 138587205465 - 2³ = 138587205457 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 23 ways as a sum of consecutive naturals, for example, 49671439 + ... + 49674228.

It is an arithmetic number, because the mean of its divisors is an integer number (10331949472).

Almost surely, 2^138587205465 is an apocalyptic number.

138587205465 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

138587205465 is a deficient number, since it is larger than the sum of its proper divisors (109379581863).

138587205465 is a wasteful number, since it uses less digits than its factorization.

138587205465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99345709 (or 99345706 counting only the distinct ones).

The product of its (nonzero) digits is 8064000, while the sum is 54.

The spelling of 138587205465 in words is "one hundred thirty-eight billion, five hundred eighty-seven million, two hundred five thousand, four hundred sixty-five".