137800385849 has 4 divisors (see below), whose sum is σ = 157486155264. Its totient is φ = 118114616436.

The previous prime is 137800385843. The next prime is 137800385869. The reversal of 137800385849 is 948583008731.

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, and also an emirpimes, since its reverse is a distinct semiprime: 948583008731 = 54277 ⋅17476703.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-137800385849 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 137800385794 and 137800385803.

It is not an unprimeable number, because it can be changed into a prime (137800385843) 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, 9842884697 + ... + 9842884710.

It is an arithmetic number, because the mean of its divisors is an integer number (39371538816).

Almost surely, 2^137800385849 is an apocalyptic number.

It is an amenable number.

137800385849 is a deficient number, since it is larger than the sum of its proper divisors (19685769415).

137800385849 is an equidigital number, since it uses as much as digits as its factorization.

137800385849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19685769414.

The product of its (nonzero) digits is 5806080, while the sum is 56.

The spelling of 137800385849 in words is "one hundred thirty-seven billion, eight hundred million, three hundred eighty-five thousand, eight hundred forty-nine".