138765151515 has 16 divisors (see below), whose sum is σ = 222695018496. Its totient is φ = 73784488800.

The previous prime is 138765151493. The next prime is 138765151523. The reversal of 138765151515 is 515151567831.

It is a happy number.

It is not a de Polignac number, because 138765151515 - 2¹² = 138765147419 is a prime.

138765151515 is a modest number, since divided by 151515 gives 138765 as remainder.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13969371 + ... + 13979300.

It is an arithmetic number, because the mean of its divisors is an integer number (13918438656).

Almost surely, 2^138765151515 is an apocalyptic number.

138765151515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

138765151515 is a deficient number, since it is larger than the sum of its proper divisors (83929866981).

138765151515 is a wasteful number, since it uses less digits than its factorization.

138765151515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27949010.

The product of its digits is 630000, while the sum is 48.

The spelling of 138765151515 in words is "one hundred thirty-eight billion, seven hundred sixty-five million, one hundred fifty-one thousand, five hundred fifteen".