137540126539 has 4 divisors (see below), whose sum is σ = 138115608480. Its totient is φ = 136964644600.

The previous prime is 137540126533. The next prime is 137540126557. The reversal of 137540126539 is 935621045731.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 137540126539 - 2⁷ = 137540126411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (137540126533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 287740612 + ... + 287741089.

It is an arithmetic number, because the mean of its divisors is an integer number (34528902120).

Almost surely, 2^137540126539 is an apocalyptic number.

137540126539 is a deficient number, since it is larger than the sum of its proper divisors (575481941).

137540126539 is an equidigital number, since it uses as much as digits as its factorization.

137540126539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 575481940.

The product of its (nonzero) digits is 680400, while the sum is 46.

The spelling of 137540126539 in words is "one hundred thirty-seven billion, five hundred forty million, one hundred twenty-six thousand, five hundred thirty-nine".