137844920849 has 4 divisors (see below), whose sum is σ = 138421678080. Its totient is φ = 137268163620.

The previous prime is 137844920833. The next prime is 137844920929. The reversal of 137844920849 is 948029448731.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 137844920849 - 2⁴ = 137844920833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (137844920449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 288378257 + ... + 288378734.

It is an arithmetic number, because the mean of its divisors is an integer number (34605419520).

Almost surely, 2^137844920849 is an apocalyptic number.

It is an amenable number.

137844920849 is a deficient number, since it is larger than the sum of its proper divisors (576757231).

137844920849 is an equidigital number, since it uses as much as digits as its factorization.

137844920849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 576757230.

The product of its (nonzero) digits is 13934592, while the sum is 59.

The spelling of 137844920849 in words is "one hundred thirty-seven billion, eight hundred forty-four million, nine hundred twenty thousand, eight hundred forty-nine".