137638902649 has 16 divisors (see below), whose sum is σ = 146406113280. Its totient is φ = 129029377680.

The previous prime is 137638902641. The next prime is 137638902683. The reversal of 137638902649 is 946209836731.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 137638902649 - 2³ = 137638902641 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 137638902593 and 137638902602.

It is not an unprimeable number, because it can be changed into a prime (137638902641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 849714 + ... + 998644.

It is an arithmetic number, because the mean of its divisors is an integer number (9150382080).

Almost surely, 2^137638902649 is an apocalyptic number.

137638902649 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

137638902649 is a deficient number, since it is larger than the sum of its proper divisors (8767210631).

137638902649 is a wasteful number, since it uses less digits than its factorization.

137638902649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149460.

The product of its (nonzero) digits is 11757312, while the sum is 58.

The spelling of 137638902649 in words is "one hundred thirty-seven billion, six hundred thirty-eight million, nine hundred two thousand, six hundred forty-nine".