137512751515 has 4 divisors (see below), whose sum is σ = 165015301824. Its totient is φ = 110010201208.

The previous prime is 137512751513. The next prime is 137512751527. The reversal of 137512751515 is 515157215731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 515157215731 = 31 ⋅16617974701.

It is a cyclic number.

It is not a de Polignac number, because 137512751515 - 2¹ = 137512751513 is a prime.

It is a super-2 number, since 2×137512751515² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (137512751513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13751275147 + ... + 13751275156.

It is an arithmetic number, because the mean of its divisors is an integer number (41253825456).

Almost surely, 2^137512751515 is an apocalyptic number.

137512751515 is a deficient number, since it is larger than the sum of its proper divisors (27502550309).

137512751515 is an equidigital number, since it uses as much as digits as its factorization.

137512751515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27502550308.

The product of its digits is 183750, while the sum is 43.

The spelling of 137512751515 in words is "one hundred thirty-seven billion, five hundred twelve million, seven hundred fifty-one thousand, five hundred fifteen".