137849221145 has 4 divisors (see below), whose sum is σ = 165419065380. Its totient is φ = 110279376912.

The previous prime is 137849221141. The next prime is 137849221157. The reversal of 137849221145 is 541122948731.

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

It can be written as a sum of positive squares in 2 ways, for example, as 39667892224 + 98181328921 = 199168^2 + 313339^2 .

It is a cyclic number.

It is not a de Polignac number, because 137849221145 - 2² = 137849221141 is a prime.

It is a super-3 number, since 3×137849221145³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 137849221145.

It is not an unprimeable number, because it can be changed into a prime (137849221141) 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, 13784922110 + ... + 13784922119.

It is an arithmetic number, because the mean of its divisors is an integer number (41354766345).

Almost surely, 2^137849221145 is an apocalyptic number.

It is an amenable number.

137849221145 is a deficient number, since it is larger than the sum of its proper divisors (27569844235).

137849221145 is an equidigital number, since it uses as much as digits as its factorization.

137849221145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27569844234.

The product of its digits is 483840, while the sum is 47.

The spelling of 137849221145 in words is "one hundred thirty-seven billion, eight hundred forty-nine million, two hundred twenty-one thousand, one hundred forty-five".