137975831649 has 20 divisors (see below), whose sum is σ = 212760824320. Its totient is φ = 89016663960.

The previous prime is 137975831639. The next prime is 137975831659. The reversal of 137975831649 is 946138579731.

137975831649 is a `hidden beast` number, since 1 + 3 + 7 + 9 + 7 + 583 + 1 + 6 + 49 = 666.

It is an interprime number because it is at equal distance from previous prime (137975831639) and next prime (137975831659).

It is not a de Polignac number, because 137975831649 - 2²⁰ = 137974783073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (137975831629) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 27471769 + ... + 27476790.

It is an arithmetic number, because the mean of its divisors is an integer number (10638041216).

Almost surely, 2^137975831649 is an apocalyptic number.

It is an amenable number.

137975831649 is a deficient number, since it is larger than the sum of its proper divisors (74784992671).

137975831649 is an equidigital number, since it uses as much as digits as its factorization.

137975831649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54948602 (or 54948593 counting only the distinct ones).

The product of its digits is 34292160, while the sum is 63.

The spelling of 137975831649 in words is "one hundred thirty-seven billion, nine hundred seventy-five million, eight hundred thirty-one thousand, six hundred forty-nine".