137805818357 has 2 divisors, whose sum is σ = 137805818358. Its totient is φ = 137805818356.

The previous prime is 137805818351. The next prime is 137805818377. The reversal of 137805818357 is 753818508731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 112381834756 + 25423983601 = 335234^2 + 159449^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-137805818357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137805818351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68902909178 + 68902909179.

It is an arithmetic number, because the mean of its divisors is an integer number (68902909179).

Almost surely, 2^137805818357 is an apocalyptic number.

It is an amenable number.

137805818357 is a deficient number, since it is larger than the sum of its proper divisors (1).

137805818357 is an equidigital number, since it uses as much as digits as its factorization.

137805818357 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5644800, while the sum is 56.

The spelling of 137805818357 in words is "one hundred thirty-seven billion, eight hundred five million, eight hundred eighteen thousand, three hundred fifty-seven".